rfc2629.xslt

<!--
    XSLT transformation from RFC2629 XML format to HTML

    Copyright (c) 2006-2010, Julian Reschke (julian.reschke@greenbytes.de)
    All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    * Neither the name of Julian Reschke nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.
-->

<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="1.0"
                
                xmlns:date="http://exslt.org/dates-and-times"
                xmlns:ed="http://greenbytes.de/2002/rfcedit"
                xmlns:exslt="http://exslt.org/common"
                xmlns:msxsl="urn:schemas-microsoft-com:xslt"
                xmlns:myns="mailto:julian.reschke@greenbytes.de?subject=rcf2629.xslt"
                xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
                xmlns:saxon="http://saxon.sf.net/"
                xmlns:saxon-old="http://icl.com/saxon"
                xmlns:x="http://purl.org/net/xml2rfc/ext"
                xmlns:xhtml="http://www.w3.org/1999/xhtml"

                exclude-result-prefixes="date ed exslt msxsl myns rdf saxon saxon-old x xhtml"
                >

<xsl:strip-space elements="back front list middle rfc section"/>                
                
<xsl:output method="html" encoding="iso-8859-1" version="4.0" doctype-public="-//W3C//DTD HTML 4.01//EN" indent="no"/>

<!-- rfc comments PI -->

<xsl:param name="xml2rfc-comments">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'comments'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- rfc compact PI -->

<xsl:param name="xml2rfc-compact">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'compact'"/>
    <xsl:with-param name="default" select="$xml2rfc-rfcedstyle"/>
  </xsl:call-template>
</xsl:param>

<!-- rfc footer PI -->

<xsl:param name="xml2rfc-footer">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'footer'"/>
  </xsl:call-template>
</xsl:param>

<!-- rfc header PI -->

<xsl:param name="xml2rfc-header">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'header'"/>
  </xsl:call-template>
</xsl:param>

<!-- rfc inline PI -->

<xsl:param name="xml2rfc-inline">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'inline'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- include a table of contents if a processing instruction <?rfc?>
     exists with contents toc="yes". Can be overriden by an XSLT parameter -->

<xsl:param name="xml2rfc-toc">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'toc'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- optional tocdepth-->

<xsl:param name="xml2rfc-tocdepth">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'tocdepth'"/>
    <xsl:with-param name="default" select="'3'"/>
  </xsl:call-template>
</xsl:param>

<xsl:variable name="parsedTocDepth">
  <xsl:choose>
    <xsl:when test="$xml2rfc-tocdepth='1'">1</xsl:when>
    <xsl:when test="$xml2rfc-tocdepth='2'">2</xsl:when>
    <xsl:when test="$xml2rfc-tocdepth='3'">3</xsl:when>
    <xsl:when test="$xml2rfc-tocdepth='4'">4</xsl:when>
    <xsl:when test="$xml2rfc-tocdepth='5'">5</xsl:when>
    <xsl:otherwise>99</xsl:otherwise>
  </xsl:choose>
</xsl:variable>

<!-- suppress top block if a processing instruction <?rfc?>
     exists with contents tocblock="no". Can be overriden by an XSLT parameter -->

<xsl:param name="xml2rfc-topblock">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'topblock'"/>
    <xsl:with-param name="default" select="'yes'"/>
  </xsl:call-template>
</xsl:param>

<!-- Format to the RFC Editor's taste -->

<xsl:param name="xml2rfc-rfcedstyle">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'rfcedstyle'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- the name of an automatically inserted references section -->

<xsl:param name="xml2rfc-refparent">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'refparent'"/>
    <xsl:with-param name="default" select="'References'"/>
  </xsl:call-template>
</xsl:param>

<!-- use symbolic reference names instead of numeric ones unless a processing instruction <?rfc?>
     exists with contents symrefs="no". Can be overriden by an XSLT parameter -->

<xsl:param name="xml2rfc-symrefs">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'symrefs'"/>
    <xsl:with-param name="default" select="'yes'"/>
  </xsl:call-template>
</xsl:param>

<!-- sort references if a processing instruction <?rfc?>
     exists with contents sortrefs="yes". Can be overriden by an XSLT parameter -->

<xsl:param name="xml2rfc-sortrefs">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'sortrefs'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- insert editing marks if a processing instruction <?rfc?>
     exists with contents editing="yes". Can be overriden by an XSLT parameter -->

<xsl:param name="xml2rfc-editing">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'editing'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- make it a private paper -->

<xsl:param name="xml2rfc-private">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'private'"/>
  </xsl:call-template>
</xsl:param>

<!-- background image? -->

<xsl:param name="xml2rfc-background">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'background'"/>
  </xsl:call-template>
</xsl:param>

<!-- extension for XML parsing in artwork -->

<xsl:param name="xml2rfc-ext-parse-xml-in-artwork">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'parse-xml-in-artwork'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<xsl:param name="xml2rfc-ext-trace-parse-xml">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'trace-parse-xml'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- extension for excluding DCMI properties in meta tag (RFC2731) -->

<xsl:param name="xml2rfc-ext-support-rfc2731">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'support-rfc2731'"/>
    <xsl:with-param name="default" select="'yes'"/>
  </xsl:call-template>
</xsl:param>

<!-- extension for allowing markup inside artwork -->

<xsl:param name="xml2rfc-ext-allow-markup-in-artwork">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'allow-markup-in-artwork'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- extension for including references into index -->

<xsl:param name="xml2rfc-ext-include-references-in-index">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'include-references-in-index'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- position of author's section -->

<xsl:param name="xml2rfc-ext-authors-section">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'authors-section'"/>
  </xsl:call-template>
</xsl:param>

<!-- justification? -->

<xsl:param name="xml2rfc-ext-justification">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'justification'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- switch for doublesided layout -->

<xsl:param name="xml2rfc-ext-duplex">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'duplex'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- experimental support for TLP 4.0, work in progress -->

<xsl:param name="xml2rfc-ext-tlp">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'tlp'"/>
    <xsl:with-param name="default" select="''"/>
  </xsl:call-template>
</xsl:param>

<!-- trailing dots in section numbers -->

<xsl:param name="xml2rfc-ext-sec-no-trailing-dots">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'sec-no-trailing-dots'"/>
  </xsl:call-template>
</xsl:param>

<!-- choose whether or not to do mailto links --> 
  
<xsl:param name="xml2rfc-linkmailto">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc-ext')"/>
    <xsl:with-param name="attr" select="'linkmailto'"/>
    <xsl:with-param name="default" select="'yes'"/>
  </xsl:call-template>
</xsl:param>

<!-- iprnotified switch --> 
  
<xsl:param name="xml2rfc-iprnotified">
  <xsl:call-template name="parse-pis">
    <xsl:with-param name="nodes" select="/processing-instruction('rfc')"/>
    <xsl:with-param name="attr" select="'iprnotified'"/>
    <xsl:with-param name="default" select="'no'"/>
  </xsl:call-template>
</xsl:param>

<!-- URL templates for RFCs and Internet Drafts. -->

<!-- Reference the authorative ASCII versions
<xsl:param name="rfcUrlPrefix" select="'http://www.ietf.org/rfc/rfc'" />
<xsl:param name="rfcUrlPostfix" select="'.txt'" />
-->
<!-- Reference the marked up versions over on http://tools.ietf.org/html. -->
<xsl:param name="rfcUrlPrefix" select="'http://tools.ietf.org/html/rfc'" />
<xsl:param name="rfcUrlPostfix" select="''" />
<xsl:param name="rfcUrlFragSection" select="'section-'" />
<xsl:param name="rfcUrlFragAppendix" select="'appendix-'" />
<xsl:param name="internetDraftUrlPrefix" select="'http://tools.ietf.org/html/'" />
<xsl:param name="internetDraftUrlPostfix" select="''" />
<xsl:param name="internetDraftUrlFrag" select="'section-'" />

<!-- warning re: absent node-set ext. function -->
<xsl:variable name="node-set-warning">
  This stylesheet requires either an XSLT-1.0 processor with node-set()
  extension function, or an XSLT-2.0 processor. Therefore, parts of the
  document couldn't be displayed.
</xsl:variable>

<!-- character translation tables -->
<xsl:variable name="lcase" select="'abcdefghijklmnopqrstuvwxyz'" />
<xsl:variable name="ucase" select="'ABCDEFGHIJKLMNOPQRSTUVWXYZ'" />       

<!-- build help keys for indices -->
<xsl:key name="index-first-letter"
  match="iref|reference"
    use="translate(substring(concat(@anchor,@item),1,1),'abcdefghijklmnopqrstuvwxyz','ABCDEFGHIJKLMNOPQRSTUVWXYZ')" />

<xsl:key name="index-item"
  match="iref"
    use="@item" />

<xsl:key name="index-item-subitem"
  match="iref"
    use="concat(@item,'..',@subitem)" />

<xsl:key name="index-xref-by-sec"
  match="xref[@x:sec]"
    use="concat(@target,'..',@x:sec)" />

<xsl:key name="index-xref-by-anchor"
  match="xref[@x:rel]"
    use="concat(@target,'..',@x:rel)" />

<xsl:key name="anchor-item"
  match="//*[@anchor]"
    use="@anchor"/>

<xsl:key name="xref-item"
  match="//xref"
    use="@target"/>

<xsl:key name="extref-item"
  match="//x:ref"
    use="."/>

<!-- prefix for automatically generated anchors -->
<xsl:variable name="anchor-prefix" select="'rfc'" />

<!-- IPR version switch -->
<xsl:variable name="ipr-rfc3667" select="(
  /rfc/@number &gt; 3708) or
  not(
    (/rfc/@ipr = 'full2026') or
    (/rfc/@ipr = 'noDerivativeWorks2026') or
    (/rfc/@ipr = 'noDerivativeWorksNow') or
    (/rfc/@ipr = 'none') or
    (/rfc/@ipr = '') or
    not(/rfc/@ipr)
  )" />

<xsl:variable name="rfcno" select="/rfc/@number"/>  

<xsl:variable name="submissionType">
  <xsl:choose>
    <xsl:when test="/rfc/@submissionType='IETF' or not(/rfc/@submissionType) or /rfc/submissionType=''">IETF</xsl:when>
    <xsl:when test="/rfc/@submissionType='IAB' or /rfc/@submissionType='IRTF' or /rfc/@submissionType='independent'">
      <xsl:value-of select="/rfc/@submissionType"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="concat('(UNSUPPORTED SUBMISSION TYPE: ',/rfc/@submissionType,')')"/>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('Unsupported value for /rfc/@submissionType: ', /rfc/@submissionType)"/>
        <xsl:with-param name="inline" select="'no'"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:variable>

<!-- Header format as defined in RFC 5741, and deployed end of Dec 2009 -->
<xsl:variable name="header-format">
  <xsl:choose>
    <xsl:when test="$pub-yearmonth >= 201001 or
      ($rfcno=5741 or $rfcno=5742 or $rfcno=5743)"
      >2010</xsl:when>
    <xsl:otherwise/>
  </xsl:choose>   
</xsl:variable>

<xsl:variable name="rfc-boilerplate">
  <xsl:choose>
    <!-- RFC boilerplate as defined in RFC 5741, and deployed end of Dec 2009 -->
    <xsl:when test="$pub-yearmonth >= 201001 or
      ($rfcno=5741 or $rfcno=5742 or $rfcno=5743)"
      >2010</xsl:when>
    <xsl:when test="$xml2rfc-ext-tlp='4'">2010</xsl:when>
    <xsl:otherwise/>
  </xsl:choose>   
</xsl:variable>

<xsl:variable name="id-boilerplate">
  <xsl:choose>
    <!-- ID boilerplate approved by IESG on Jan 14 2010-->
    <xsl:when test="$pub-yearmonth >= 201006"
      >2010</xsl:when>
    <xsl:otherwise/>
  </xsl:choose>   
</xsl:variable>

<xsl:variable name="ipr-rfc4748" select="(
  $ipr-rfc3667 and
    ( $rfcno &gt;= 4715 and ( $rfcno != 4718 and $rfcno != 4735 and $rfcno != 4749 ))
    or
    ( $rfcno=4578 or $rfcno=4582 or $rfcno=4583 or $rfcno=4628 or $rfcno=4629 or $rfcno=4639 or $rfcno=4651 or $rfcno=4682 or $rfcno=4684 or $rfcno=4695 or $rfcno=4696 )
    or
    ( not(/rfc/@number) and $pub-yearmonth >= 200611)
  )" />

<xsl:variable name="ipr-2007-08" select="(
  $ipr-rfc4748 and
    (
      ($rfcno &gt; 5000
        and $rfcno != 5020
        and $rfcno != 5021
        and $rfcno != 5034
        and $rfcno != 5052
        and $rfcno != 5065
        and $rfcno != 5094) or
      ($xml2rfc-ext-pub-year >= 2008) or
      (not(/rfc/@number) and $pub-yearmonth >= 200709)
    )
  )" />

<xsl:variable name="ipr-2008-11" select="(
    /rfc/@number and $pub-yearmonth >= 200811
  )
  or
  (
    /rfc/@ipr = 'trust200811' or
    /rfc/@ipr = 'noModificationTrust200811' or
    /rfc/@ipr = 'noDerivativesTrust200902' or
    /rfc/@ipr = 'trust200902' or
    /rfc/@ipr = 'noModificationTrust200902' or
    /rfc/@ipr = 'noDerivativesTrust200902' or
    /rfc/@ipr = 'pre5378Trust200902'
  )" />

<xsl:variable name="ipr-2009-02" select="(
    $ipr-2008-11 and $pub-yearmonth >= 200902
  )" />

<!-- this makes the Sep 2009 TLP text depend on the publication date to be >= 2009-11 
     for IDs, and around 2009-09 for RFCs-->
<xsl:variable name="ipr-2009-09" select="(
    ( not(/rfc/@number) and $pub-yearmonth >= 200911 )
    or
    (
      /rfc/@number and $pub-yearmonth >= 200909 and
      $rfcno!=5582 and $rfcno!=5621 and $rfcno!=5632 and $rfcno!=5645 and $rfcno!=5646 and $rfcno!=5681 
    )
  )" />

<!-- this makes the Jan 2010 TLP text depend on the tlp ext PI
     for IDs, and around 2010-01 for RFCs-->
<xsl:variable name="ipr-2010-01" select="(
    ( not(/rfc/@number) and $xml2rfc-ext-tlp='4' )
    or
    (
      /rfc/@number and ($pub-yearmonth >= 201001 or
      $rfcno=5741 or $rfcno=5742 or $rfcno=5743) 
    )
  )" />

<!-- see http://mailman.rfc-editor.org/pipermail/rfc-interest/2009-June/001373.html -->
<!-- for IDs, implement the change as 2009-11 -->
<xsl:variable name="abstract-first" select="(
    (/rfc/@number and $pub-yearmonth >= 200907)
    or
    (not(/rfc/@number) and $pub-yearmonth >= 200911)
  )" />

<!-- funding switch -->  
<xsl:variable name="funding0" select="(
  $rfcno &gt; 2499) or
  (not(/rfc/@number) and /rfc/@docName and $xml2rfc-ext-pub-year &gt;= 1999
  )" />
  
<xsl:variable name="funding1" select="(
  $rfcno &gt; 4320) or
  (not(/rfc/@number) and /rfc/@docName and $xml2rfc-ext-pub-year &gt;= 2006
  )" />

<xsl:variable name="no-funding" select="$ipr-2007-08"/>

<xsl:variable name="no-copylong" select="$ipr-2008-11"/>

<!-- will document have an index -->
<xsl:variable name="has-index" select="//iref or (//xref and $xml2rfc-ext-include-references-in-index='yes')" />
          
<!-- does the document contain edits? -->
<xsl:variable name="has-edits" select="//ed:ins | //ed:del | //ed:replace" />
              
<xsl:template match="text()[not(ancestor::artwork)]">
  <xsl:variable name="ws" select="'&#9;&#10;&#13;&#32;'"/>
  <xsl:variable name="starts-with-ws" select="translate(substring(.,1,1),$ws,'')"/>
  <xsl:variable name="ends-with-ws" select="translate(substring(.,string-length(.),1),$ws,'')"/>
  <!--<xsl:message> Orig: "<xsl:value-of select="."/>"</xsl:message>
  <xsl:message>Start: "<xsl:value-of select="$starts-with-ws"/>"</xsl:message>
  <xsl:message>  End: "<xsl:value-of select="$ends-with-ws"/>"</xsl:message> -->
  <xsl:if test="$starts-with-ws='' and preceding-sibling::node()">
    <xsl:text> </xsl:text>
  </xsl:if>
  <xsl:value-of select="normalize-space(.)"/>
  <xsl:if test="$ends-with-ws='' and following-sibling::node()">
    <xsl:text> </xsl:text>
  </xsl:if>
</xsl:template>
              
              
<xsl:template match="abstract">
  <h1 id="{$anchor-prefix}.abstract"><a href="#{$anchor-prefix}.abstract">Abstract</a></h1>
  <xsl:apply-templates />
</xsl:template>

<msxsl:script language="JScript" implements-prefix="myns">
  function parseXml(str) {
    try {
      var doc = new ActiveXObject("MSXML2.DOMDocument");
      doc.async = false;
      if (doc.loadXML(str)) {
        return "";
      }
      else {
        return doc.parseError.reason + "\n" + doc.parseError.srcText + " (" + doc.parseError.line + "/" + doc.parseError.linepos + ")";
      }
    }
    catch(e) {
      return "";
    }
  }
</msxsl:script>

<xsl:template name="add-artwork-class">
  <xsl:choose>
    <xsl:when test="@type='abnf' or @type='abnf2045' or @type='abnf2616' or @type='application/xml-dtd' or @type='inline' or @type='application/relax-ng-compact-syntax'">
      <xsl:attribute name="class">inline</xsl:attribute>
    </xsl:when>
    <xsl:when test="starts-with(@type,'message/http') and contains(@type,'msgtype=&quot;request&quot;')">
      <xsl:attribute name="class">text2</xsl:attribute>
    </xsl:when>
    <xsl:when test="starts-with(@type,'message/http')">
      <xsl:attribute name="class">text</xsl:attribute>
    </xsl:when>
    <xsl:when test="starts-with(@type,'drawing')">
      <xsl:attribute name="class">drawing</xsl:attribute>
    </xsl:when>
    <xsl:when test="starts-with(@type,'text/plain') or @type='example' or @type='code'">
      <xsl:attribute name="class">text</xsl:attribute>
    </xsl:when>
    <xsl:otherwise/>
  </xsl:choose>
</xsl:template>

<xsl:template name="insert-begin-code">
  <xsl:if test="@x:isCodeComponent='yes'">
    <pre class="ccmarker cct"><span>&lt;CODE BEGINS></span></pre>
  </xsl:if>
</xsl:template>

<xsl:template name="insert-end-code">
  <xsl:if test="@x:isCodeComponent='yes'">
    <pre class="ccmarker ccb"><span>&lt;CODE ENDS></span></pre>
  </xsl:if>
</xsl:template>

<xsl:template match="artwork">
  <xsl:if test="not(ancestor::ed:del) and $xml2rfc-ext-parse-xml-in-artwork='yes' and function-available('myns:parseXml')">
    <xsl:if test="contains(.,'&lt;?xml')">
      <xsl:variable name="body" select="substring-after(substring-after(.,'&lt;?xml'),'?>')" /> 
      <xsl:if test="$body!='' and myns:parseXml($body)!=''">
        <table style="background-color: red; border-width: thin; border-style: solid; border-color: black;">
        <tr><td>
        XML PARSE ERROR; parsed the body below:
        <pre>
        <xsl:value-of select="$body"/>
        </pre>
        resulting in:
        <pre>
        <xsl:value-of select="myns:parseXml($body)" />
        </pre>
        </td></tr></table>
      </xsl:if>
    </xsl:if>
    <xsl:if test="@ed:parse-xml-after">
      <xsl:if test="myns:parseXml(string(.))!=''">
        <table style="background-color: red; border-width: thin; border-style: solid; border-color: black;">
        <tr><td>
        XML PARSE ERROR:
        <pre><xsl:value-of select="myns:parseXml(string(.))" /></pre>
        </td></tr></table>
      </xsl:if>
    </xsl:if>
  </xsl:if>
  <xsl:variable name="display">
    <xsl:choose>
      <xsl:when test="$xml2rfc-ext-allow-markup-in-artwork='yes'">
        <xsl:apply-templates/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="."/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>  
  <xsl:choose>
    <xsl:when test="@align='right'">
      <div style="display:table; margin-left: auto; margin-right: 0pt;">
        <xsl:call-template name="insert-begin-code"/>
        <pre style="margin-left: 0em;">
          <xsl:call-template name="add-artwork-class"/>
          <xsl:call-template name="insertInsDelClass"/>
          <xsl:copy-of select="$display"/>
        </pre>          
        <xsl:call-template name="insert-end-code"/>
      </div>
    </xsl:when>
    <xsl:when test="@align='center'">
      <div style="display:table; margin-left: auto; margin-right: auto;">
        <xsl:call-template name="insert-begin-code"/>
        <pre style="margin-left: 0em;">
          <xsl:call-template name="add-artwork-class"/>
          <xsl:call-template name="insertInsDelClass"/>
          <xsl:copy-of select="$display"/>
        </pre>          
        <xsl:call-template name="insert-end-code"/>
      </div>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="insert-begin-code"/>
      <pre>
        <xsl:call-template name="add-artwork-class"/>
        <xsl:call-template name="insertInsDelClass"/>
        <xsl:copy-of select="$display"/>
      </pre>
      <xsl:call-template name="insert-end-code"/>
    </xsl:otherwise>
  </xsl:choose>
  <xsl:call-template name="check-artwork-width">
    <xsl:with-param name="content"><xsl:apply-templates/></xsl:with-param>
    <xsl:with-param name="indent"><xsl:value-of select="string-length(@x:indent-with)"/></xsl:with-param>
  </xsl:call-template>
</xsl:template>

<!-- special case for first text node in artwork -->
<xsl:template match="artwork/text()[1]">
  <xsl:choose>
    <xsl:when test="starts-with(.,'&#10;')">
      <!-- reduce leading whitespace -->
      <xsl:value-of select="substring(.,2)"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="."/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>


<xsl:template name="check-artwork-width">
  <xsl:param name="content"/>
  <xsl:param name="indent"/>
  <xsl:choose>
    <xsl:when test="not(contains($content,'&#10;'))">
      <xsl:if test="string-length($content) > 69 + $indent">
        <xsl:call-template name="warning">
          <xsl:with-param name="inline" select="'no'"/>
          <xsl:with-param name="msg">artwork line too long: '<xsl:value-of select="$content"/>' (<xsl:value-of select="string-length($content)"/> characters)</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="start" select="substring-before($content,'&#10;')"/> 
      <xsl:variable name="end" select="substring-after($content,'&#10;')"/> 
      <xsl:if test="string-length($start) > 69 + $indent">
        <xsl:call-template name="warning">
          <xsl:with-param name="inline" select="'no'"/>
          <xsl:with-param name="msg">artwork line too long: '<xsl:value-of select="$start"/>' (<xsl:value-of select="string-length($start)"/> characters)</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
      <xsl:call-template name="check-artwork-width">
        <xsl:with-param name="content" select="$end"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="artwork[@src and starts-with(@type,'image/')]">
  <p>
    <xsl:choose>
      <xsl:when test="@align='center'">
        <xsl:attribute name="style">text-align: center</xsl:attribute>
      </xsl:when>
      <xsl:when test="@align='right'">
        <xsl:attribute name="style">text-align: right</xsl:attribute>
      </xsl:when>
      <xsl:otherwise/>
    </xsl:choose>
    <xsl:choose>
      <xsl:when test="@type='image/svg+xml'">
        <object data="{@src}" type="image/svg+xml">
          <xsl:choose>
            <xsl:when test="@width!='' or @height!=''">
              <xsl:copy-of select="@width|@height"/>
            </xsl:when>
            <xsl:otherwise xmlns:svg="http://www.w3.org/2000/svg">
              <!-- try to find width and height from SVG -->
              <xsl:variable name="svg" select="document(@src)"/>
              <xsl:for-each select="$svg/svg:svg/@width|$svg/svg:svg/@height">
                <!-- strip out the units, cross the fingers pixels are meant -->
                <xsl:attribute name="{local-name()}">
                  <xsl:value-of select="translate(.,concat($ucase,$lcase),'')"/>
                </xsl:attribute>
              </xsl:for-each>
            </xsl:otherwise>
          </xsl:choose>
          <xsl:apply-templates/>
        </object>
      </xsl:when>
      <xsl:otherwise>
        <img src="{@src}" alt="{.}">
          <xsl:if test="@width and @width!=''">
            <xsl:copy-of select="@width"/>
          </xsl:if>
          <xsl:if test="@height and @height!=''">
            <xsl:copy-of select="@height"/>
          </xsl:if>
        </img>
      </xsl:otherwise>
    </xsl:choose>
  </p>
</xsl:template>

<xsl:template match="author">

    <address class="vcard">
      <span class="vcardline">
        <span class="fn">
          <xsl:value-of select="@fullname" />
        </span>
        <xsl:if test="@role">
          (<xsl:value-of select="@role" />)
        </xsl:if>
        <!-- annotation support for Martin "uuml" Duerst -->
        <xsl:if test="@x:annotation">
          <xsl:text> </xsl:text> 
          <i><xsl:value-of select="@x:annotation"/></i>
        </xsl:if>
        <!-- components of name (hidden from display -->
        <span class="n hidden">
          <span class="family-name"><xsl:value-of select="@surname"/></span>
          <!-- given-name family-name -->
          <xsl:if test="@surname=substring(@fullname,1 + string-length(@fullname) - string-length(@surname))">
            <span class="given-name"><xsl:value-of select="normalize-space(substring(@fullname,1,string-length(@fullname) - string-length(@surname)))"/></span>
          </xsl:if>
          <!-- family-name given-name -->
          <xsl:if test="starts-with(@fullname,@surname)">
            <span class="given-name"><xsl:value-of select="normalize-space(substring-after(@fullname,@surname))"/></span>
          </xsl:if>
        </span>
      </span>
      <xsl:if test="normalize-space(organization) != ''">
        <span class="org vcardline">
          <xsl:value-of select="organization" />
        </span>
      </xsl:if>
      <xsl:if test="address/postal">
        <span class="adr">
          <xsl:if test="address/postal/street!=''">
            <xsl:for-each select="address/postal/street">
              <span class="street-address vcardline">
                <xsl:call-template name="extract-normalized">
                  <xsl:with-param name="node" select="."/>
                  <xsl:with-param name="name" select="'street'"/>
                </xsl:call-template>
              </span>
            </xsl:for-each>
          </xsl:if>
          <xsl:if test="address/postal/city|address/postal/region|address/postal/code">
            <span class="vcardline">
              <xsl:if test="address/postal/city">
                <span class="locality">
                  <xsl:call-template name="extract-normalized">
                    <xsl:with-param name="node" select="address/postal/city"/>
                    <xsl:with-param name="name" select="'address/postal/city'"/>
                  </xsl:call-template>
                </span>
                <xsl:text>, </xsl:text>
              </xsl:if>
              <xsl:if test="address/postal/region">
                <span class="region">
                  <xsl:call-template name="extract-normalized">
                    <xsl:with-param name="node" select="address/postal/region"/>
                    <xsl:with-param name="name" select="'address/postal/region'"/>
                  </xsl:call-template>
                </span>
                <xsl:text>&#160;</xsl:text>
              </xsl:if>
              <xsl:if test="address/postal/code">
                <span class="postal-code">
                  <xsl:call-template name="extract-normalized">
                    <xsl:with-param name="node" select="address/postal/code"/>
                    <xsl:with-param name="name" select="'address/postal/code'"/>
                  </xsl:call-template>
                </span>
              </xsl:if>
            </span>
          </xsl:if>
          <xsl:if test="address/postal/country">
            <span class="country-name vcardline">
              <xsl:call-template name="extract-normalized">
                <xsl:with-param name="node" select="address/postal/country"/>
                <xsl:with-param name="name" select="'address/postal/country'"/>
              </xsl:call-template>
            </span>
          </xsl:if>
        </span>
      </xsl:if>
      <xsl:if test="address/phone">
        <span class="vcardline tel">
          <xsl:text>Phone: </xsl:text>
          <a href="tel:{translate(address/phone,' ','')}"><span class="value"><xsl:value-of select="address/phone" /></span></a>
        </span>
      </xsl:if>
      <xsl:if test="address/facsimile">
        <span class="vcardline tel">
          <span class="type">Fax</span><xsl:text>: </xsl:text>
          <a href="fax:{translate(address/facsimile,' ','')}"><span class="value"><xsl:value-of select="address/facsimile" /></span></a>
        </span>
      </xsl:if>
      <xsl:for-each select="address/email">
        <xsl:variable name="email">
          <xsl:call-template name="extract-email"/>
        </xsl:variable>
        
        <span class="vcardline">
          <xsl:choose>
            <xsl:when test="$xml2rfc-rfcedstyle='yes'">Email: </xsl:when>
            <xsl:otherwise>EMail: </xsl:otherwise>
          </xsl:choose>
          <a>
            <xsl:if test="$xml2rfc-linkmailto!='no'">
              <xsl:attribute name="href">mailto:<xsl:value-of select="$email" /></xsl:attribute>
            </xsl:if>
            <span class="email"><xsl:value-of select="$email" /></span>
          </a>
        </span>
      </xsl:for-each>
      <xsl:for-each select="address/uri">
        <xsl:variable name="uri">
          <xsl:call-template name="extract-uri"/>
        </xsl:variable>

        <span class="vcardline">
          <xsl:text>URI: </xsl:text>
          <a href="{$uri}" class="url"><xsl:value-of select="$uri" /></a>
          <xsl:if test="@x:annotation">
            <xsl:text> </xsl:text> 
            <i><xsl:value-of select="@x:annotation"/></i>
          </xsl:if>
        </span>
      </xsl:for-each>
    </address>

</xsl:template>

<!-- this is a named template because <back> may be absent -->
<xsl:template name="back">

  <!-- add editorial comments -->
  <xsl:if test="//cref and $xml2rfc-comments='yes' and $xml2rfc-inline!='yes'">
    <xsl:call-template name="insertComments" />
  </xsl:if>
  
  <!-- next, add information about the document's authors -->
  <xsl:if test="$xml2rfc-ext-authors-section!='end'">
    <xsl:call-template name="insertAuthors" />
  </xsl:if>
     
  <!-- add all other top-level sections under <back> -->
  <xsl:apply-templates select="back/*[not(self::references) and not(self::ed:replace and .//references)]" />

  <!-- insert the index if index entries exist -->
  <!-- note it always comes before the authors section -->
  <xsl:if test="$has-index">
    <xsl:call-template name="insertIndex" />
  </xsl:if>

  <!-- Authors section is the absolute last thing, except for copyright stuff -->
  <xsl:if test="$xml2rfc-ext-authors-section='end'">
    <xsl:call-template name="insertAuthors" />
  </xsl:if>

  <xsl:if test="$xml2rfc-private=''">
    <!-- copyright statements -->
    <xsl:variable name="copyright"><xsl:call-template name="insertCopyright" /></xsl:variable>
  
    <!-- emit it -->
    <xsl:choose>
      <xsl:when test="function-available('exslt:node-set')">
        <xsl:apply-templates select="exslt:node-set($copyright)" />
      </xsl:when>
      <xsl:otherwise>
        <xsl:call-template name="error">
          <xsl:with-param name="msg" select="$node-set-warning"/>
        </xsl:call-template>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:if>
  
</xsl:template>

<xsl:template match="eref[node()]">
  <a href="{@target}"><xsl:apply-templates /></a>
</xsl:template>
               
<xsl:template match="eref[not(node())]">
  <xsl:text>&lt;</xsl:text>
  <a href="{@target}"><xsl:value-of select="@target" /></a>
  <xsl:text>&gt;</xsl:text>
</xsl:template>

<xsl:template match="figure">
  <xsl:if test="@anchor!=''">
    <xsl:call-template name="check-anchor"/>
    <div id="{@anchor}"/>
  </xsl:if>
  <xsl:variable name="anch">
    <xsl:call-template name="get-figure-anchor"/>
  </xsl:variable>
  <div id="{$anch}" />
  <xsl:apply-templates />
  <xsl:if test="(@title!='' or @anchor!='') and not(@suppress-title='true')">
    <xsl:variable name="n"><xsl:number level="any" count="figure[(@title!='' or @anchor!='') and not(@suppress-title='true')]" /></xsl:variable>
    <p class="figure">Figure <xsl:value-of select="$n"/><xsl:if test="@title!=''">: <xsl:value-of select="@title" /></xsl:if></p>
  </xsl:if>
</xsl:template>

<xsl:template match="front">
  
  <xsl:if test="$xml2rfc-topblock!='no'">
    <!-- collect information for left column -->
      
    <xsl:variable name="leftColumn">
      <xsl:call-template name="collectLeftHeaderColumn" />    
    </xsl:variable>
  
    <!-- collect information for right column -->
      
    <xsl:variable name="rightColumn">
      <xsl:call-template name="collectRightHeaderColumn" />    
    </xsl:variable>
      
    <!-- insert the collected information -->
    <table class="header">
      <xsl:choose>
        <xsl:when test="function-available('exslt:node-set')">
          <xsl:call-template name="emitheader">
            <xsl:with-param name="lc" select="exslt:node-set($leftColumn)" />    
            <xsl:with-param name="rc" select="exslt:node-set($rightColumn)" />    
          </xsl:call-template>
        </xsl:when>    
        <xsl:otherwise>
          <xsl:call-template name="error">
            <xsl:with-param name="msg" select="$node-set-warning"/>
          </xsl:call-template>
        </xsl:otherwise>
      </xsl:choose>
    </table>
  </xsl:if>
    
  <p class="title">
    <!-- main title -->

    <xsl:apply-templates select="title"/>
    <xsl:if test="/rfc/@docName">
      <br/>
      <span class="filename"><xsl:value-of select="/rfc/@docName"/></span>
      
      <xsl:if test="contains(/rfc/@docName,'.')">
        <xsl:call-template name="warning">
          <xsl:with-param name="msg">The @docName attribute should contain the base name, not the filename (thus no file extension).</xsl:with-param>
        </xsl:call-template>
      </xsl:if>
    </xsl:if>  
  </p>
  
  <!-- insert notice about update -->
  <xsl:variable name="published-as" select="/*/x:link[@rel='Alternate' and starts-with(@title,'RFC')]"/>
  <xsl:if test="$published-as">
    <p style="color: green; text-align: center; font-size: 14pt; background-color: yellow;">
      <b>Note:</b> a later version of this document has been published as <a href="{$published-as/@href}"><xsl:value-of select="$published-as/@title"/></a>.
    </p>
  </xsl:if>
    
  <!-- check for conforming ipr attribute -->
  <xsl:choose>
    <xsl:when test="not(/rfc/@ipr)" />
    <xsl:when test="/rfc/@ipr = 'full2026'" />
    <xsl:when test="/rfc/@ipr = 'noDerivativeWorks'" />
    <xsl:when test="/rfc/@ipr = 'noDerivativeWorksNow'" />
    <xsl:when test="/rfc/@ipr = 'none'" />
    <xsl:when test="/rfc/@ipr = 'full3667'" />
    <xsl:when test="/rfc/@ipr = 'noModification3667'" />
    <xsl:when test="/rfc/@ipr = 'noDerivatives3667'" />
    <xsl:when test="/rfc/@ipr = 'full3978'" />
    <xsl:when test="/rfc/@ipr = 'noModification3978'" />
    <xsl:when test="/rfc/@ipr = 'noDerivatives3978'" />
    <xsl:when test="/rfc/@ipr = 'trust200811'" />
    <xsl:when test="/rfc/@ipr = 'noModificationTrust200811'" />
    <xsl:when test="/rfc/@ipr = 'noDerivativesTrust200811'" />
    <xsl:when test="/rfc/@ipr = 'trust200902'" />
    <xsl:when test="/rfc/@ipr = 'noModificationTrust200902'" />
    <xsl:when test="/rfc/@ipr = 'noDerivativesTrust200902'" />
    <xsl:when test="/rfc/@ipr = 'pre5378Trust200902'" />
    <xsl:otherwise>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('Unknown value for /rfc/@ipr: ', /rfc/@ipr)"/>
      </xsl:call-template>
    </xsl:otherwise>        
  </xsl:choose>            

  <xsl:if test="$xml2rfc-private='' and not($abstract-first)">
    <xsl:call-template name="emit-ietf-preamble"/>
  </xsl:if>
 
  <xsl:apply-templates select="x:boilerplate"/>
  <xsl:apply-templates select="abstract" />
  <xsl:apply-templates select="note" />
  <!-- show notes inside change tracking as well -->
  <xsl:apply-templates select="ed:replace[.//note]" />
    
  <xsl:if test="$xml2rfc-private='' and $abstract-first">
    <xsl:call-template name="emit-ietf-preamble"/>
  </xsl:if>

  <xsl:if test="$xml2rfc-toc='yes'">
    <xsl:apply-templates select="/" mode="toc" />
    <xsl:call-template name="insertTocAppendix" />
  </xsl:if>

</xsl:template>

<xsl:template name="emit-ietf-preamble">
  <!-- Get status info formatted as per RFC2629-->
  <xsl:variable name="preamble">
    <xsl:call-template name="insertPreamble" />
  </xsl:variable>
  
  <!-- emit it -->
  <xsl:choose>
    <xsl:when test="function-available('exslt:node-set')">
      <xsl:apply-templates select="exslt:node-set($preamble)" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="$node-set-warning"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="iref">
  <xsl:variable name="anchor"><xsl:call-template name="compute-iref-anchor"/></xsl:variable>
  <xsl:choose>
    <xsl:when test="parent::figure">
      <div id="{$anchor}"/>
    </xsl:when>
    <xsl:when test="ancestor::t or ancestor::artwork or ancestor::preamble or ancestor::postamble">
      <span id="{$anchor}"/>
    </xsl:when>
    <xsl:otherwise>
      <div id="{$anchor}"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="compute-iref-anchor">
  <xsl:variable name="first" select="translate(substring(@item,1,1),$ucase,$lcase)"/>
  <xsl:variable name="nkey" select="translate($first,$lcase,'')"/>
  <xsl:choose>
    <xsl:when test="$nkey=''">
      <xsl:value-of select="$anchor-prefix"/>.iref.<xsl:value-of select="$first"/>.<xsl:number level="any" count="iref[starts-with(translate(@item,$ucase,$lcase),$first)]"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$anchor-prefix"/>.iref.<xsl:number level="any" count="iref[translate(substring(@item,1,1),concat($lcase,$ucase),'')='']"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="compute-extref-anchor">
  <xsl:variable name="first" select="translate(substring(.,1,1),$ucase,$lcase)"/>
  <xsl:variable name="nkey" select="translate($first,$lcase,'')"/>
  <xsl:choose>
    <xsl:when test="$nkey=''">
      <xsl:value-of select="$anchor-prefix"/>.extref.<xsl:value-of select="$first"/>.<xsl:number level="any" count="x:ref[starts-with(translate(.,$ucase,$lcase),$first)]"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$anchor-prefix"/>.extref.<xsl:number level="any" count="x:ref[translate(substring(.,1,1),concat($lcase,$ucase),'')='']"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- list templates depend on the list style -->

<xsl:template match="list[@style='empty' or not(@style)]">
  <ul class="empty">
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </ul>
</xsl:template>

<xsl:template match="list[starts-with(@style,'format ')]">
  <dl>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </dl>
</xsl:template>

<xsl:template match="list[@style='hanging']">
  <dl>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </dl>
</xsl:template>

<xsl:template match="list[@style='numbers']">
  <ol>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </ol>
</xsl:template>

<!-- numbered list inside numbered list -->
<xsl:template match="list[@style='numbers']/t/list[@style='numbers']" priority="9">
  <ol style="list-style-type: lower-alpha">
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </ol>
</xsl:template>

<xsl:template match="list[@style='letters']">
  <ol style="list-style-type: lower-alpha">
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </ol>
</xsl:template>

<!-- nested lettered list uses uppercase -->
<xsl:template match="list//t//list[@style='letters']" priority="9">
  <ol style="list-style-type: upper-alpha">
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </ol>
</xsl:template>
   
<xsl:template match="list[@style='symbols']">
  <ul>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </ul>
</xsl:template>


<!-- same for t(ext) elements -->

<xsl:template match="list[@style='empty' or not(@style)]/t | list[@style='empty' or not(@style)]/ed:replace/ed:*/t">
  <!-- Inherited through CSS now <dd style="margin-top: .5em">-->
  <li>
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </li>
</xsl:template>

<xsl:template match="list[@style='numbers' or @style='symbols' or @style='letters']/x:lt">
  <li>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates select="t" />
  </li>
</xsl:template>

<xsl:template match="list[@style='numbers' or @style='symbols' or @style='letters']/t | list[@style='numbers' or @style='symbols' or @style='letters']/ed:replace/ed:*/t">
  <li>
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:for-each select="../..">
      <xsl:call-template name="insert-issue-pointer"/>
    </xsl:for-each>
    <xsl:apply-templates />
  </li>
</xsl:template>

<xsl:template match="list[@style='hanging']/x:lt">
  <xsl:if test="@hangText!=''">
    <dt>
      <xsl:call-template name="copy-anchor"/>
      <xsl:call-template name="insertInsDelClass"/>
      <xsl:variable name="del-node" select="ancestor::ed:del"/>
      <xsl:variable name="rep-node" select="ancestor::ed:replace"/>
      <xsl:variable name="deleted" select="$del-node and ($rep-node/ed:ins)"/>
      <xsl:for-each select="../..">
        <xsl:call-template name="insert-issue-pointer">
          <xsl:with-param name="deleted-anchor" select="$deleted"/>
        </xsl:call-template>
      </xsl:for-each>
      <xsl:value-of select="@hangText" />
    </dt>
  </xsl:if>
  <dd>
    <xsl:call-template name="insertInsDelClass"/>
    <!-- if hangIndent present, use 0.7 of the specified value (1em is the width of the "m" character -->
    <xsl:if test="../@hangIndent and ../@hangIndent!='0'">
      <xsl:attribute name="style">margin-left: <xsl:value-of select="../@hangIndent * 0.7"/>em</xsl:attribute>
    </xsl:if>
    <xsl:apply-templates select="t" />
  </dd>
</xsl:template>

<xsl:template match="list[@style='hanging']/t | list[@style='hanging']/ed:replace/ed:*/t">
  <xsl:if test="@hangText!=''">
    <dt>
      <xsl:call-template name="copy-anchor"/>
      <xsl:call-template name="insertInsDelClass"/>
      <xsl:if test="count(preceding-sibling::t)=0">
        <xsl:variable name="del-node" select="ancestor::ed:del"/>
        <xsl:variable name="rep-node" select="ancestor::ed:replace"/>
        <xsl:variable name="deleted" select="$del-node and ($rep-node/ed:ins)"/>
        <xsl:for-each select="../..">
          <xsl:call-template name="insert-issue-pointer">
            <xsl:with-param name="deleted-anchor" select="$deleted"/>
          </xsl:call-template>
        </xsl:for-each>
      </xsl:if>
      <xsl:value-of select="@hangText" />
    </dt>
  </xsl:if>

  <xsl:variable name="dd-content">
    <xsl:apply-templates/>
  </xsl:variable>

  <xsl:if test="$dd-content!=''">
    <dd>
      <xsl:call-template name="insertInsDelClass"/>
      <!-- if hangIndent present, use 0.7 of the specified value (1em is the width of the "m" character -->
      <xsl:if test="../@hangIndent and ../@hangIndent!='0'">
        <xsl:attribute name="style">margin-left: <xsl:value-of select="../@hangIndent * 0.7"/>em</xsl:attribute>
      </xsl:if>
      <xsl:apply-templates />
    </dd>
  </xsl:if>
</xsl:template>

<xsl:template match="list[starts-with(@style,'format ') and (contains(@style,'%c') or contains(@style,'%d'))]/t">
  <xsl:variable name="list" select=".." />
  <xsl:variable name="format" select="substring-after(../@style,'format ')" />
  <xsl:variable name="pos">
    <xsl:choose>
      <xsl:when test="$list/@counter">
        <xsl:number level="any" count="list[@counter=$list/@counter or (not(@counter) and @style=concat('format ',$list/@counter))]/t" />
      </xsl:when>
      <xsl:otherwise>
        <xsl:number level="any" count="list[concat('format ',@counter)=$list/@style or (not(@counter) and @style=$list/@style)]/t" />
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <dt>
    <xsl:call-template name="copy-anchor"/>
    <xsl:choose>
      <xsl:when test="contains($format,'%c')">
        <xsl:value-of select="substring-before($format,'%c')"/><xsl:number value="$pos" format="a" /><xsl:value-of select="substring-after($format,'%c')"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="substring-before($format,'%d')"/><xsl:number value="$pos" format="1" /><xsl:value-of select="substring-after($format,'%d')"/>
      </xsl:otherwise>
    </xsl:choose>
  </dt>
  <dd>
    <xsl:apply-templates />
  </dd>
</xsl:template>

<xsl:template match="middle">
  <xsl:apply-templates />
  <xsl:apply-templates select="../back//references"/>
</xsl:template>

<xsl:template match="note">
  <xsl:variable name="num"><xsl:number/></xsl:variable>
    <h1 id="{$anchor-prefix}.note.{$num}">
      <xsl:call-template name="insertInsDelClass"/>
      <a href="#{$anchor-prefix}.note.{$num}">
        <xsl:value-of select="@title" />
      </a>
    </h1>
  <xsl:apply-templates />
</xsl:template>

<xsl:template match="postamble">
  <xsl:if test="normalize-space(.) != ''">
    <p>
      <xsl:call-template name="insertInsDelClass"/>
      <xsl:call-template name="editingMark" />
      <xsl:apply-templates />
    </p>
  </xsl:if>
</xsl:template>

<xsl:template match="preamble">
  <xsl:if test="normalize-space(.) != ''">
    <p>
      <xsl:call-template name="copy-anchor"/>
      <xsl:call-template name="insertInsDelClass"/>
      <xsl:call-template name="editingMark" />
      <xsl:apply-templates />
    </p>
  </xsl:if>
</xsl:template>

<xsl:template name="computed-auto-target">
  <xsl:param name="bib"/>
  <xsl:param name="ref"/>

  <xsl:choose>
    <xsl:when test="$ref and $bib/x:source/@href and $bib/x:source/@basename and $ref/@x:rel">
      <xsl:value-of select="concat($bib/x:source/@basename,'.html',$ref/@x:rel)" />
    </xsl:when>
    <xsl:when test="$bib/seriesInfo/@name='RFC'">
      <xsl:variable name="sec">
        <xsl:choose>
          <xsl:when test="$ref and starts-with($ref/@x:rel,'#') and not($ref/@x:sec)">
            <xsl:variable name="extdoc" select="document($bib/x:source/@href)"/>
            <xsl:for-each select="$extdoc//*[@anchor=substring-after($ref/@x:rel,'#')]">
              <xsl:call-template name="get-section-number"/>
            </xsl:for-each>
          </xsl:when>
          <xsl:when test="$ref">
            <xsl:value-of select="$ref/@x:sec"/>
          </xsl:when>
          <xsl:otherwise/>
        </xsl:choose>
      </xsl:variable>
      <xsl:value-of select="concat($rfcUrlPrefix,$bib/seriesInfo[@name='RFC']/@value,$rfcUrlPostfix)" />
      <xsl:if test="$ref and $sec!='' and $rfcUrlFragSection and $rfcUrlFragAppendix">
        <xsl:choose>
          <xsl:when test="translate(substring($sec,1,1),$ucase,'')=''">
            <xsl:value-of select="concat('#',$rfcUrlFragAppendix,$sec)"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:value-of select="concat('#',$rfcUrlFragSection,$sec)"/>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:if>
    </xsl:when>
    <xsl:when test="$bib/seriesInfo/@name='Internet-Draft'">
      <xsl:value-of select="concat($internetDraftUrlPrefix,$bib/seriesInfo[@name='Internet-Draft']/@value,$internetDraftUrlPostfix)" />
      <xsl:if test="$ref and $ref/@x:sec and $internetDraftUrlFrag">
        <xsl:value-of select="concat('#',$internetDraftUrlFrag,$ref/@x:sec)"/>
      </xsl:if>
    </xsl:when>
    <xsl:otherwise />
  </xsl:choose>  
  
</xsl:template>

<xsl:template name="computed-target">
  <xsl:param name="bib"/>
  <xsl:param name="ref"/>

  <xsl:choose>
    <xsl:when test="$bib/@target">
      <xsl:if test="$ref and $ref/@x:sec and $ref/@x:rel">
        <xsl:value-of select="concat($bib/@target,$ref/@x:rel)"/>
      </xsl:if>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="computed-auto-target">
        <xsl:with-param name="bib" select="$bib"/>
        <xsl:with-param name="ref" select="$ref"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>  
  
</xsl:template>

<xsl:template match="reference">

  <!-- check for reference to reference -->
  <xsl:variable name="anchor" select="@anchor"/>
  <xsl:if test="not(ancestor::ed:del) and not(key('xref-item',$anchor))">
    <xsl:call-template name="warning">
      <xsl:with-param name="inline" select="'no'"/>
      <xsl:with-param name="msg">unused reference '<xsl:value-of select="@anchor"/>'</xsl:with-param>
    </xsl:call-template>
  </xsl:if>

  <!-- check normative/informative -->
  <xsl:variable name="t-r-is-normative" select="ancestor-or-self::*[@x:nrm][1]"/>
  <xsl:variable name="r-is-normative" select="$t-r-is-normative/@x:nrm='true'"/>
  <xsl:if test="$r-is-normative and not(ancestor::ed:del)">
    <xsl:variable name="tst">
      <xsl:for-each select="key('xref-item',$anchor)">
        <xsl:variable name="t-is-normative" select="ancestor-or-self::*[@x:nrm][1]"/>
        <xsl:variable name="is-normative" select="$t-is-normative/@x:nrm='true'"/>
        <xsl:if test="$is-normative">OK</xsl:if>
      </xsl:for-each>
    </xsl:variable>
    <xsl:if test="$tst=''">
      <xsl:call-template name="warning">
        <xsl:with-param name="inline" select="'no'"/>
        <xsl:with-param name="msg">all references to the normative reference '<xsl:value-of select="@anchor"/>' appear to be informative</xsl:with-param>
      </xsl:call-template>
    </xsl:if>
  </xsl:if>

  <xsl:call-template name="check-anchor"/>

  <xsl:variable name="target">
    <xsl:choose>
      <xsl:when test="@target"><xsl:value-of select="@target" /></xsl:when>
      <xsl:otherwise>
        <xsl:call-template name="computed-auto-target">
          <xsl:with-param name="bib" select="."/>
        </xsl:call-template>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  
  <tr>
    <td class="reference">
      <xsl:call-template name="insertInsDelClass"/>
      <xsl:variable name="del-node" select="ancestor::ed:del"/>
      <xsl:variable name="rep-node" select="ancestor::ed:replace"/>
      <xsl:variable name="deleted" select="$del-node and ($rep-node/ed:ins)"/>
      <xsl:for-each select="../..">
        <xsl:call-template name="insert-issue-pointer">
          <xsl:with-param name="deleted-anchor" select="$deleted"/>
        </xsl:call-template>
      </xsl:for-each>
      <b id="{@anchor}">
        <xsl:call-template name="referencename">
          <xsl:with-param name="node" select="." />
        </xsl:call-template>
      </b>
    </td>
    
    <td class="top">
      <xsl:call-template name="insertInsDelClass"/>
      <xsl:for-each select="front/author">
        <xsl:variable name="initials">
          <xsl:call-template name="format-initials"/>
        </xsl:variable>
      
        <xsl:choose>
          <xsl:when test="@surname and @surname!=''">
            <xsl:variable name="displayname">
              <!-- surname/initials is reversed for last author except when it's the only one -->
              <xsl:choose>
                <xsl:when test="position()=last() and position()!=1">
                  <xsl:value-of select="concat($initials,' ',@surname)" />
                </xsl:when>
                <xsl:otherwise>
                  <xsl:value-of select="concat(@surname,', ',$initials)" />
                </xsl:otherwise>
              </xsl:choose>
              <xsl:if test="@role='editor'">
                <xsl:text>, Ed.</xsl:text>
              </xsl:if>
            </xsl:variable>
            <xsl:choose>
              <xsl:when test="address/email">
                <a>
                  <xsl:if test="$xml2rfc-linkmailto!='no'">
                    <xsl:attribute name="href">mailto:<xsl:value-of select="address/email" /></xsl:attribute>
                  </xsl:if>
                  <xsl:if test="organization/text()">
                    <xsl:attribute name="title"><xsl:value-of select="organization/text()"/></xsl:attribute>
                  </xsl:if>
                  <xsl:value-of select="$displayname" />
                </a>
              </xsl:when>
              <xsl:otherwise>
                <xsl:value-of select="$displayname" />
              </xsl:otherwise>
            </xsl:choose>
            
            <xsl:choose>
              <xsl:when test="position()=last() - 1">
                <xsl:if test="last() &gt; 2">,</xsl:if>
                <xsl:text> and </xsl:text>
              </xsl:when>
              <xsl:otherwise>
                <xsl:text>, </xsl:text>
              </xsl:otherwise>
            </xsl:choose>
          </xsl:when>
          <xsl:when test="organization/text()">
            <xsl:choose>
              <xsl:when test="address/uri">
                <a href="{address/uri}"><xsl:value-of select="organization" /></a>
              </xsl:when>
              <xsl:otherwise>
                <xsl:value-of select="organization" />
              </xsl:otherwise>
            </xsl:choose>
            
            <xsl:choose>
              <xsl:when test="position()=last() - 1">
                <xsl:if test="last() &gt; 2">,</xsl:if>
                <xsl:text> and </xsl:text>
              </xsl:when>
              <xsl:otherwise>
                <xsl:text>, </xsl:text>
              </xsl:otherwise>
            </xsl:choose>
          </xsl:when>
          <xsl:otherwise />
        </xsl:choose>
      </xsl:for-each>
         
      <xsl:choose>
        <xsl:when test="string-length($target) &gt; 0">
          <xsl:text>&#8220;</xsl:text>
          <a href="{$target}"><xsl:value-of select="normalize-space(front/title)" /></a>
          <xsl:text>&#8221;</xsl:text>
        </xsl:when>
        <xsl:otherwise>
          <xsl:text>&#8220;</xsl:text>
          <xsl:value-of select="normalize-space(front/title)" />
          <xsl:text>&#8221;</xsl:text>
        </xsl:otherwise>
      </xsl:choose>
            
      <xsl:for-each select="seriesInfo">
        <xsl:text>, </xsl:text>
        <xsl:choose>
          <xsl:when test="not(@name) and not(@value) and ./text()"><xsl:value-of select="." /></xsl:when>
          <xsl:otherwise>
            <xsl:value-of select="@name" />
            <xsl:if test="@value!=''">&#0160;<xsl:value-of select="@value" /></xsl:if>
            <xsl:if test="translate(@name,$ucase,$lcase)='internet-draft'"> (work in progress)</xsl:if>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:for-each>
      
      <xsl:if test="front/date/@year != ''">
        <xsl:if test="string(number(front/date/@year)) = 'NaN'">
          <xsl:call-template name="warning">
            <xsl:with-param name="inline" select="'no'"/>
            <xsl:with-param name="msg">date/@year should be a number: '<xsl:value-of select="front/date/@year"/>' in reference '<xsl:value-of select="@anchor"/>'</xsl:with-param>
          </xsl:call-template>
        </xsl:if>
        <xsl:text>, </xsl:text>
        <xsl:if test="front/date/@month!=''"><xsl:value-of select="front/date/@month" />&#0160;</xsl:if>
        <xsl:value-of select="front/date/@year" />
      </xsl:if>
      
      <xsl:if test="@target">
        <xsl:text>, &lt;</xsl:text>
        <a href="{@target}"><xsl:value-of select="@target"/></a>
        <xsl:text>&gt;</xsl:text>
      </xsl:if>
      
      <xsl:text>.</xsl:text>

      <xsl:for-each select="annotation">
        <br />
        <xsl:apply-templates />
      </xsl:for-each>

    </td>
  </tr>
  
  
</xsl:template>


<xsl:template match="references">

  <xsl:variable name="name">
    <xsl:if test="ancestor::ed:del">
      <xsl:text>del-</xsl:text>
    </xsl:if>
    <xsl:number level="any"/>      
  </xsl:variable>
  
  <xsl:variable name="refseccount" select="count(/rfc/back/references)+count(/rfc/back/ed:replace/ed:ins/references)"/>

  <!-- insert pseudo section when needed -->
  <xsl:if test="not(preceding::references) and $refseccount!=1">
    <xsl:call-template name="insert-conditional-hrule"/>
    <h1 id="{$anchor-prefix}.references">
      <xsl:call-template name="insert-conditional-pagebreak"/>
      <xsl:variable name="sectionNumber">
        <xsl:call-template name="get-references-section-number"/>
      </xsl:variable>
      <a id="{$anchor-prefix}.section.{$sectionNumber}" href="#{$anchor-prefix}.section.{$sectionNumber}">
        <xsl:call-template name="emit-section-number">
          <xsl:with-param name="no" select="$sectionNumber"/>
        </xsl:call-template>
      </a>
      <xsl:text> </xsl:text>
      <xsl:value-of select="$xml2rfc-refparent"/>
    </h1>
  </xsl:if>
  
  <xsl:variable name="elemtype">
    <xsl:choose>
      <xsl:when test="$refseccount!=1">h2</xsl:when>
      <xsl:otherwise>h1</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  
  <xsl:variable name="title">
    <xsl:choose>
      <xsl:when test="not(@title) or @title=''"><xsl:value-of select="$xml2rfc-refparent"/></xsl:when>
      <xsl:otherwise><xsl:value-of select="@title"/></xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  
  <xsl:element name="{$elemtype}"> 
    <xsl:if test="$name='1'">
      <xsl:call-template name="insert-conditional-pagebreak"/>
    </xsl:if>
    <xsl:variable name="sectionNumber">
      <xsl:call-template name="get-section-number"/>
    </xsl:variable>
    <xsl:variable name="anchorpref">
      <xsl:choose>
        <xsl:when test="$elemtype='h1'"></xsl:when>
        <xsl:otherwise>.<xsl:value-of select="$name"/></xsl:otherwise>
      </xsl:choose>
    </xsl:variable>
    <xsl:attribute name="id"><xsl:value-of select="concat($anchor-prefix,'.references',$anchorpref)"/></xsl:attribute>
    <a href="#{$anchor-prefix}.section.{$sectionNumber}" id="{$anchor-prefix}.section.{$sectionNumber}">
      <xsl:call-template name="emit-section-number">
        <xsl:with-param name="no" select="$sectionNumber"/>
      </xsl:call-template>
    </a>
    <xsl:text> </xsl:text>
    <xsl:value-of select="$title"/>
  </xsl:element>
 
  <table>
    <xsl:choose>
      <xsl:when test="$xml2rfc-sortrefs='yes' and $xml2rfc-symrefs!='no'">
        <xsl:apply-templates>
          <xsl:sort select="@anchor|.//ed:ins//reference/@anchor" />
        </xsl:apply-templates>
      </xsl:when>
      <xsl:otherwise>
        <xsl:apply-templates />
      </xsl:otherwise>
    </xsl:choose>
  </table>

</xsl:template>

<xsl:template match="rfc">
  
  <xsl:variable name="ignored">
    <xsl:call-template name="parse-pis">
      <xsl:with-param name="nodes" select="//processing-instruction('rfc-ext')"/>
      <xsl:with-param name="attr" select="'SANITYCHECK'"/>
    </xsl:call-template>
    <xsl:call-template name="parse-pis">
      <xsl:with-param name="nodes" select="//processing-instruction('rfc')"/>
      <xsl:with-param name="attr" select="'SANITYCHECK'"/>
    </xsl:call-template>
  </xsl:variable>

  <xsl:variable name="lang">
    <xsl:call-template name="get-lang" />
  </xsl:variable>

  <html lang="{$lang}">
    <head>
      <xsl:attribute name="profile">
        <xsl:text>http://www.w3.org/2006/03/hcard</xsl:text>
        <xsl:if test="$xml2rfc-ext-support-rfc2731!='no'">
          <xsl:text> </xsl:text>
          <xsl:text>http://dublincore.org/documents/2008/08/04/dc-html/</xsl:text>
        </xsl:if>
      </xsl:attribute>
      <title>
        <xsl:apply-templates select="front/title" mode="get-text-content" />
      </title>
      <xsl:call-template name="insertCss" />
      <!-- <link rel="alternate stylesheet" type="text/css" media="screen" title="Plain (typewriter)" href="rfc2629tty.css" /> -->
            
      <!-- link elements -->
      <xsl:if test="$xml2rfc-toc='yes'">
        <link rel="Contents" href="#{$anchor-prefix}.toc" />
      </xsl:if>
      <link rel="Author" href="#{$anchor-prefix}.authors" />
      <xsl:if test="$xml2rfc-private=''">
        <xsl:choose>
          <xsl:when test="$no-copylong">
            <link rel="Copyright" href="#{$anchor-prefix}.copyrightnotice" />
          </xsl:when>
          <xsl:otherwise>
            <link rel="Copyright" href="#{$anchor-prefix}.copyright" />
          </xsl:otherwise>
        </xsl:choose>
      </xsl:if>
      <xsl:if test="$has-index">
        <link rel="Index" href="#{$anchor-prefix}.index" />
      </xsl:if>
      <xsl:apply-templates select="/" mode="links" />
      <xsl:for-each select="x:link">
        <link><xsl:copy-of select="@*" /></link>
      </xsl:for-each>
      <xsl:if test="@number">
        <xsl:variable name="number">
          <xsl:choose>
            <xsl:when test="string-length(@number) &lt; 2">000<xsl:value-of select="@number"/></xsl:when>
            <xsl:when test="string-length(@number) &lt; 3">00<xsl:value-of select="@number"/></xsl:when>
            <xsl:when test="string-length(@number) &lt; 4">0<xsl:value-of select="@number"/></xsl:when>
            <xsl:otherwise><xsl:value-of select="@number"/></xsl:otherwise>
          </xsl:choose>
        </xsl:variable>
        <link rel="Alternate" title="Authorative ASCII Version" href="http://www.ietf.org/rfc/rfc{@number}.txt" />
        <link rel="Help" title="Additional Information on tools.ietf.org" href="http://tools.ietf.org/html/rfc{$number}" />
      </xsl:if>

      <!-- generator -->
      <xsl:variable name="gen">
        <xsl:call-template name="get-generator" />
      </xsl:variable>
      <meta name="generator" content="{$gen}" />
      
      <!-- keywords -->
      <xsl:if test="front/keyword">
        <xsl:variable name="keyw">
          <xsl:call-template name="get-keywords" />
        </xsl:variable>
        <meta name="keywords" content="{$keyw}" />
      </xsl:if>

      <xsl:if test="$xml2rfc-ext-support-rfc2731!='no'">
        <!-- Dublin Core Metadata -->
        <link rel="schema.dct" href="http://purl.org/dc/terms/" />
              
        <!-- DC creator, see RFC2731 -->
        <xsl:for-each select="front/author">
          <xsl:variable name="initials">
            <xsl:call-template name="format-initials"/>
          </xsl:variable>
          <meta name="dct.creator" content="{concat(@surname,', ',$initials)}" />
        </xsl:for-each>
        
        <xsl:if test="$xml2rfc-private=''">
          <xsl:choose>
            <xsl:when test="@number">
              <meta name="dct.identifier" content="urn:ietf:rfc:{@number}" />
            </xsl:when>
            <xsl:when test="@docName">
              <meta name="dct.identifier" content="urn:ietf:id:{@docName}" />
            </xsl:when>
            <xsl:otherwise/>
          </xsl:choose>
          <meta name="dct.issued" scheme="ISO8601">
            <xsl:attribute name="content">
              <xsl:value-of select="concat($xml2rfc-ext-pub-year,'-',$pub-month-numeric)"/>
              <xsl:if test="$xml2rfc-ext-pub-day != '' and not(@number)">
                <xsl:value-of select="concat('-',format-number($xml2rfc-ext-pub-day,'00'))"/>
              </xsl:if>
            </xsl:attribute>
          </meta>
  
          <xsl:if test="@obsoletes!=''">
            <xsl:call-template name="rfclist-for-dcmeta">
              <xsl:with-param name="list" select="@obsoletes"/>
            </xsl:call-template>
          </xsl:if>
        </xsl:if>
  
        <xsl:if test="front/abstract">
          <meta name="dct.abstract" content="{normalize-space(front/abstract)}" />
        </xsl:if>      

        <xsl:if test="@number">
          <meta name="dct.isPartOf" content="urn:issn:2070-1721" />
        </xsl:if>      

      </xsl:if>
      
      <!-- this replicates dct.abstract, but is used by Google & friends -->
      <xsl:if test="front/abstract">
        <meta name="description" content="{normalize-space(front/abstract)}" />
      </xsl:if>
      
    </head>
    <body>
      <!-- insert diagnostics -->
      <xsl:call-template name="insert-diagnostics"/>

      <xsl:apply-templates select="front" />
      <xsl:apply-templates select="middle" />
      <xsl:call-template name="back" />
    </body>
  </html>
</xsl:template>               


<xsl:template match="t">
  <xsl:if test="preceding-sibling::section or preceding-sibling::appendix">
    <xsl:call-template name="warning">
      <xsl:with-param name="msg">The paragraph below is misplaced; maybe a section is closed in the wrong place: </xsl:with-param>
      <xsl:with-param name="msg2"><xsl:value-of select="."/></xsl:with-param>
    </xsl:call-template>
  </xsl:if>
  <xsl:choose>
    <xsl:when test="@anchor">
      <div id="{@anchor}"><xsl:apply-templates mode="t-content" select="node()[1]" /></div>
    </xsl:when>
    <xsl:otherwise>
      <xsl:apply-templates mode="t-content" select="node()[1]" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- for t-content, dispatch to default templates if it's block-level content -->
<xsl:template mode="t-content" match="list|figure|texttable">
  <!-- <xsl:comment>t-content block-level</xsl:comment>  -->
  <xsl:apply-templates select="." />
  <xsl:apply-templates select="following-sibling::node()[1]" mode="t-content" />
</xsl:template>               
               
<!-- ... otherwise group into p elements -->
<xsl:template mode="t-content" match="*|node()">
  <xsl:variable name="p">
    <xsl:call-template name="get-paragraph-number" />
  </xsl:variable>

  <!-- do not open a new p element if this is a whitespace-only text node and no siblings follow -->  
  <xsl:if test="not(self::text() and normalize-space(.)='' and not(following-sibling::node()))">
    <p>
      <xsl:if test="$p!='' and not(ancestor::ed:del) and not(ancestor::ed:ins) and not(ancestor::x:lt) and count(preceding-sibling::node())=0">
        <xsl:attribute name="id"><xsl:value-of select="$anchor-prefix"/>.section.<xsl:value-of select="$p"/></xsl:attribute>
      </xsl:if>
      <xsl:call-template name="insertInsDelClass"/>
      <xsl:call-template name="editingMark" />
      <xsl:apply-templates mode="t-content2" select="." />
    </p>
  </xsl:if>
  <xsl:apply-templates mode="t-content" select="following-sibling::*[self::list or self::figure or self::texttable][1]" />
</xsl:template>               
               
<xsl:template mode="t-content2" match="*">
  <xsl:apply-templates select="." />
  <xsl:if test="not(following-sibling::node()[1] [self::list or self::figure or self::texttable])">
    <xsl:apply-templates select="following-sibling::node()[1]" mode="t-content2" />
  </xsl:if>
</xsl:template>       

<xsl:template mode="t-content2" match="text()">
  <xsl:apply-templates select="." />
  <xsl:if test="not(following-sibling::node()[1] [self::list or self::figure or self::texttable])">
    <xsl:apply-templates select="following-sibling::node()[1]" mode="t-content2" />
  </xsl:if>
</xsl:template>               

<xsl:template mode="t-content2" match="comment()|processing-instruction()">
  <xsl:apply-templates select="." />
  <xsl:if test="not(following-sibling::node()[1] [self::list or self::figure or self::texttable])">
    <xsl:apply-templates select="following-sibling::node()[1]" mode="t-content2" />
  </xsl:if>
</xsl:template>               

<xsl:template match="title">
  <xsl:if test="@abbrev and string-length(@abbrev) > 40">
    <xsl:call-template name="warning">
      <xsl:with-param name="inline" select="'no'"/>
      <xsl:with-param name="msg">title/@abbrev too long (max 40 characters)</xsl:with-param>
    </xsl:call-template>
  </xsl:if>

  <xsl:if test="string-length(.) > 40 and (not(@abbrev) or @abbrev='')">
    <xsl:call-template name="warning">
      <xsl:with-param name="inline" select="'no'"/>
      <xsl:with-param name="msg">title too long, should supply title/@abbrev attribute with less than 40 characters</xsl:with-param>
    </xsl:call-template>
  </xsl:if>

  <xsl:apply-templates />
</xsl:template>

<xsl:template name="insertTitle">
  <xsl:choose>
    <xsl:when test="@ed:old-title">
      <del>
        <xsl:if test="ancestor-or-self::*[@ed:entered-by] and @ed:datetime">
          <xsl:attribute name="title"><xsl:value-of select="concat(@ed:datetime,', ',ancestor-or-self::*[@ed:entered-by][1]/@ed:entered-by)"/></xsl:attribute>
        </xsl:if>
        <xsl:value-of select="@ed:old-title"/>
      </del>
      <ins>
        <xsl:if test="ancestor-or-self::*[@ed:entered-by] and @ed:datetime">
          <xsl:attribute name="title"><xsl:value-of select="concat(@ed:datetime,', ',ancestor-or-self::*[@ed:entered-by][1]/@ed:entered-by)"/></xsl:attribute>
        </xsl:if>
        <xsl:value-of select="@title"/>
      </ins>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="@title"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="section|appendix">

  <xsl:if test="self::appendix">
    <xsl:call-template name="warning">
      <xsl:with-param name="inline" select="'no'"/>
      <xsl:with-param name="msg">The "appendix" element is deprecated, use "section" inside "back" instead.</xsl:with-param>
    </xsl:call-template>
  </xsl:if>

  <xsl:variable name="sectionNumber">
    <xsl:choose>
      <xsl:when test="@myns:unnumbered"></xsl:when>
      <xsl:when test="ancestor::x:boilerplate"></xsl:when>
      <xsl:otherwise><xsl:call-template name="get-section-number" /></xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
    
  <xsl:if test="not(ancestor::section) and not(ancestor::x:boilerplate) and not(@myns:notoclink)">
    <xsl:call-template name="insert-conditional-hrule"/>
  </xsl:if>
  
  <xsl:variable name="elemtype">
    <xsl:choose>
      <xsl:when test="count(ancestor::section) &lt;= 4">h<xsl:value-of select="1 + count(ancestor::section)"/></xsl:when>
      <xsl:otherwise>h6</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  
  <!-- process irefs immediadetely following the section so that their anchor
  actually is the section heading -->
  <xsl:apply-templates select="iref[count(preceding-sibling::*[not(self::iref)])=0]"/>

  <xsl:element name="{$elemtype}">
    <xsl:if test="$sectionNumber!=''">
      <xsl:attribute name="id"><xsl:value-of select="$anchor-prefix"/>.section.<xsl:value-of select="$sectionNumber"/></xsl:attribute>
    </xsl:if>
    <xsl:choose>
      <xsl:when test="$sectionNumber='1' or $sectionNumber='A'">
        <!-- pagebreak, this the first section -->
        <xsl:attribute name="class">np</xsl:attribute>
      </xsl:when>
      <xsl:when test="not(ancestor::section) and not(@myns:notoclink)">
        <xsl:call-template name="insert-conditional-pagebreak"/>
      </xsl:when>
      <xsl:otherwise/>
    </xsl:choose>
    
    <xsl:call-template name="insertInsDelClass" />
        
    <xsl:if test="$sectionNumber!='' and not(contains($sectionNumber,'unnumbered-'))">
      <a href="#{$anchor-prefix}.section.{$sectionNumber}">
        <xsl:call-template name="emit-section-number">
          <xsl:with-param name="no" select="$sectionNumber"/>
        </xsl:call-template>
      </a>
      <xsl:text>&#0160;</xsl:text>
    </xsl:if>
    
    <!-- issue tracking? -->
    <xsl:if test="@ed:resolves">
      <xsl:call-template name="insert-issue-pointer"/>
    </xsl:if>
    
    <xsl:choose>
      <xsl:when test="@anchor">
        <xsl:call-template name="check-anchor"/>
        <a id="{@anchor}" href="#{@anchor}"><xsl:call-template name="insertTitle"/></a>
      </xsl:when>
      <xsl:otherwise>
        <xsl:call-template name="insertTitle"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:element>
  <!-- continue with all child elements but the irefs processed above -->
  <xsl:apply-templates select="*[not(self::iref)]|iref[count(preceding-sibling::*[not(self::iref)])!=0]" />
</xsl:template>

<xsl:template match="spanx[@style='emph' or not(@style)]">
  <em>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates />
  </em>
</xsl:template>

<xsl:template match="spanx[@style='verb']">
  <samp>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates />
  </samp>
</xsl:template>

<xsl:template match="spanx[@style='strong']">
  <strong>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates />
  </strong>
</xsl:template>

<xsl:template name="insert-blank-lines">
  <xsl:param name="no"/>
  <xsl:choose>
    <xsl:when test="$no &lt;= 0">
      <br/>
      <!-- done -->
    </xsl:when>
    <xsl:otherwise>
      <br/>
      <xsl:call-template name="insert-blank-lines">
        <xsl:with-param name="no" select="$no - 1"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="vspace[not(@blankLines)]">
  <br />
</xsl:template>

<xsl:template match="vspace">
  <xsl:call-template name="insert-blank-lines">
    <xsl:with-param name="no" select="@blankLines"/>
  </xsl:call-template>
</xsl:template>

<!-- keep the root for the case when we process XSLT-inline markup -->
<xsl:variable name="src" select="/" />

<xsl:template name="render-section-ref">
  <xsl:param name="from" />
  <xsl:param name="to" />

  <xsl:variable name="refname">
    <xsl:for-each select="$to">
      <xsl:call-template name="get-section-type">
        <xsl:with-param name="prec" select="$from/preceding-sibling::node()[1]" />
      </xsl:call-template>
    </xsl:for-each>
  </xsl:variable>
  <xsl:variable name="refnum">
    <xsl:for-each select="$to">
      <xsl:call-template name="get-section-number" />
    </xsl:for-each>
  </xsl:variable>
  <xsl:attribute name="title">
    <xsl:value-of select="$to/@title" />
  </xsl:attribute>
  <xsl:choose>
    <xsl:when test="$from/@format='counter'">
      <xsl:value-of select="$refnum"/>
    </xsl:when>
    <xsl:when test="$from/@format='title'">
      <xsl:value-of select="$to/@title"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="normalize-space(concat($refname,'&#160;',$refnum))"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="xref[node()]">

  <xsl:variable name="target" select="@target" />
  <xsl:variable name="node" select="key('anchor-item',$target)" />
  <xsl:variable name="anchor"><xsl:value-of select="$anchor-prefix"/>.xref.<xsl:value-of select="@target"/>.<xsl:number level="any" count="xref[@target=$target]"/></xsl:variable>

  <xsl:choose>

    <!-- x:fmt='none': do not generate any links -->
    <xsl:when test="@x:fmt='none'">
      <xsl:choose>
        <xsl:when test="$node/self::reference">
          <cite title="{normalize-space($node/front/title)}">
            <xsl:if test="$xml2rfc-ext-include-references-in-index='yes'">
              <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
            </xsl:if>
            <!-- insert id when a backlink to this xref is needed in the index -->
            <xsl:if test="//iref[@x:for-anchor=$target] | //iref[@x:for-anchor='' and ../@anchor=$target]">
              <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
            </xsl:if>
            <xsl:apply-templates/>
          </cite>
        </xsl:when>
        <xsl:otherwise>
          <xsl:apply-templates/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>
  
    <!-- Other x:fmt values than "none": unsupported -->
    <xsl:when test="@x:fmt and @x:fmt!='none'">
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('unknown xref/@x:fmt extension: ',@x:fmt)"/>
      </xsl:call-template>
    </xsl:when>
    
    <!-- Section links -->
    <xsl:when test="$node/self::section or $node/self::appendix">
      <xsl:choose>
        <xsl:when test="@format='none'">
          <a href="#{@target}">
            <!-- insert id when a backlink to this xref is needed in the index -->
            <xsl:if test="//iref[@x:for-anchor=$target] | //iref[@x:for-anchor='' and ../@anchor=$target]">
              <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
            </xsl:if>
            <xsl:apply-templates/>
          </a>
        </xsl:when>
        <xsl:otherwise>
          <xsl:apply-templates/>
          <xsl:text> (</xsl:text>
          <a href="#{@target}">
            <!-- insert id when a backlink to this xref is needed in the index -->
            <xsl:if test="//iref[@x:for-anchor=$target] | //iref[@x:for-anchor='' and ../@anchor=$target]">
              <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
            </xsl:if>
            <xsl:call-template name="render-section-ref">
              <xsl:with-param name="from" select="."/>
              <xsl:with-param name="to" select="$node"/>
            </xsl:call-template>
          </a>
          <xsl:text>)</xsl:text>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>

    <xsl:otherwise>
      <!-- check normative/informative -->
      <xsl:variable name="t-is-normative" select="ancestor-or-self::*[@x:nrm][1]"/>
      <xsl:variable name="is-normative" select="$t-is-normative/@x:nrm='true'"/>
      <xsl:if test="count($node)=1 and $is-normative">
        <xsl:variable name="t-r-is-normative" select="$node/ancestor-or-self::*[@x:nrm][1]"/>
        <xsl:variable name="r-is-normative" select="$t-r-is-normative/@x:nrm='true'"/>
        <xsl:if test="not($r-is-normative)">
          <xsl:call-template name="warning">
            <xsl:with-param name="inline" select="'no'"/>
            <xsl:with-param name="msg" select="concat('Potentially normative reference to ',@target,' not referenced normatively')"/>
          </xsl:call-template>
        </xsl:if>
      </xsl:if>
      
      <a href="#{$target}">
        <xsl:if test="@format='none'">
          <xsl:if test="$xml2rfc-ext-include-references-in-index='yes'">
            <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
          </xsl:if>
        </xsl:if>
        <xsl:apply-templates />
      </a>
      <xsl:if test="not(@format='none')">
        <xsl:for-each select="$src/rfc/back/references//reference[@anchor=$target]">
          <xsl:text> </xsl:text>
          <cite title="{normalize-space(front/title)}">
            <xsl:if test="$xml2rfc-ext-include-references-in-index='yes'">
              <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
            </xsl:if>
            <xsl:call-template name="referencename">
               <xsl:with-param name="node" select="." />
            </xsl:call-template>
          </cite>
        </xsl:for-each>
      </xsl:if>
    </xsl:otherwise>
  </xsl:choose>

</xsl:template>
               
<xsl:key name="iref-xanch" match="iref[@x:for-anchor]" use="@x:for-anchor"/>            
               
<xsl:template match="xref[not(node())]">

  <xsl:variable name="xref" select="."/>
  <xsl:variable name="anchor"><xsl:value-of select="$anchor-prefix"/>.xref.<xsl:value-of select="$xref/@target"/>.<xsl:number level="any" count="xref[@target=$xref/@target]"/></xsl:variable>

  <!-- ensure we have the right context, this <xref> may be processed from within the boilerplate -->
  <xsl:for-each select="$src">

    <xsl:variable name="node" select="key('anchor-item',$xref/@target)" />
    <xsl:if test="count($node)=0 and not($node/ancestor::ed:del)">
      <xsl:for-each select="$xref">
        <xsl:call-template name="error">
          <xsl:with-param name="msg" select="concat('Undefined target: ',$xref/@target)"/>
        </xsl:call-template>
      </xsl:for-each>
    </xsl:if>

    <xsl:choose>
    
      <!-- Section links -->
      <xsl:when test="$node/self::section or $node/self::appendix">
        <a href="#{$xref/@target}">
          <!-- insert id when a backlink to this xref is needed in the index -->
          <xsl:if test="key('iref-xanch',$xref/@target) | key('iref-xanch','')[../@anchor=$xref/@target]">
            <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
          </xsl:if>
          <xsl:call-template name="render-section-ref">
            <xsl:with-param name="from" select="$xref"/>
            <xsl:with-param name="to" select="$node"/>
          </xsl:call-template>
        </a>
      </xsl:when>
  
      <!-- Figure links -->
      <xsl:when test="$node/self::figure">
        <a href="#{$xref/@target}">
          <xsl:variable name="figcnt">
            <xsl:for-each select="$node">
              <xsl:number level="any" count="figure[(@title!='' or @anchor!='') and not(@suppress-title='true')]" />
            </xsl:for-each>
          </xsl:variable>
          <xsl:choose>
            <xsl:when test="$xref/@format='counter'">
              <xsl:value-of select="$figcnt" />
            </xsl:when>
            <xsl:when test="$xref/@format='title'">
              <xsl:value-of select="$node/@title" />
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="normalize-space(concat('Figure&#160;',$figcnt))"/>
            </xsl:otherwise>
          </xsl:choose>
        </a>
      </xsl:when>
      
      <!-- Table links -->
      <xsl:when test="$node/self::texttable">
        <a href="#{$xref/@target}">
          <xsl:variable name="tabcnt">
            <xsl:for-each select="$node">
              <xsl:number level="any" count="texttable[(@title!='' or @anchor!='') and not(@suppress-title='true')]" />
            </xsl:for-each>
          </xsl:variable>
          <xsl:choose>
            <xsl:when test="$xref/@format='counter'">
              <xsl:value-of select="$tabcnt" />
            </xsl:when>
            <xsl:when test="$xref/@format='title'">
              <xsl:value-of select="$node/@title" />
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="normalize-space(concat('Table&#160;',$tabcnt))"/>
            </xsl:otherwise>
          </xsl:choose>
        </a>
      </xsl:when>
      
      <!-- Paragraph links -->
      <xsl:when test="$node/self::t">
        <a href="#{$xref/@target}">
          <xsl:variable name="tcnt">
            <xsl:for-each select="$node">
              <xsl:call-template name="get-paragraph-number" />
            </xsl:for-each>
          </xsl:variable>
          <xsl:choose>
            <xsl:when test="$xref/@format='counter'">
              <xsl:value-of select="$tcnt" />
            </xsl:when>
            <xsl:when test="$xref/@format='title'">
              <xsl:value-of select="$node/@title" />
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="normalize-space(concat('Paragraph&#160;',substring-after($tcnt,'p.')))"/>
            </xsl:otherwise>
          </xsl:choose>
        </a>
      </xsl:when>
  
      <!-- Comment links -->
      <xsl:when test="$node/self::cref">
        <a href="#{$xref/@target}">
          <xsl:variable name="name">
            <xsl:for-each select="$node">
              <xsl:call-template name="get-comment-name" />
            </xsl:for-each>
          </xsl:variable>
          <xsl:choose>
            <xsl:when test="$xref/@format='counter'">
              <xsl:value-of select="$name" />
            </xsl:when>
            <xsl:when test="$xref/@format='title'">
              <xsl:value-of select="$node/@title" />
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="normalize-space(concat('Comment&#160;',$name))"/>
            </xsl:otherwise>
          </xsl:choose>
        </a>
      </xsl:when>
  
      <!-- Reference links -->
      <xsl:when test="$node/self::reference">
  
        <!-- check normative/informative -->
        <xsl:variable name="t-is-normative" select="$xref/ancestor-or-self::*[@x:nrm][1]"/>
        <xsl:variable name="is-normative" select="$t-is-normative/@x:nrm='true'"/>
        <xsl:if test="count($node)=1 and $is-normative">
          <xsl:variable name="t-r-is-normative" select="$node/ancestor-or-self::*[@x:nrm][1]"/>
          <xsl:variable name="r-is-normative" select="$t-r-is-normative/@x:nrm='true'"/>
          <xsl:if test="not($r-is-normative)">
            <xsl:for-each select="$xref">
              <xsl:call-template name="warning">
                <xsl:with-param name="inline" select="'no'"/>
                <xsl:with-param name="msg" select="concat('Potentially normative reference to ',$xref/@target,' not referenced normatively')"/>
              </xsl:call-template>
            </xsl:for-each>
          </xsl:if>
        </xsl:if>
      
        <xsl:variable name="href">
          <xsl:call-template name="computed-target">
            <xsl:with-param name="bib" select="$node"/>
            <xsl:with-param name="ref" select="$xref"/>
          </xsl:call-template>
        </xsl:variable>
        
        <xsl:variable name="sec">
          <xsl:choose>
            <xsl:when test="starts-with($xref/@x:rel,'#') and not($xref/@x:sec) and $node/x:source/@href">
              <xsl:variable name="extdoc" select="document($node/x:source/@href)"/>
              <xsl:variable name="nodes" select="$extdoc//*[@anchor=substring-after($xref/@x:rel,'#')]"/>
              <xsl:if test="not($nodes)">
                <xsl:call-template name="error">
                  <xsl:with-param name="msg">Anchor '<xsl:value-of select="substring-after($xref/@x:rel,'#')"/>' not found in <xsl:value-of select="$node/x:source/@href"/>.</xsl:with-param>
                </xsl:call-template>
              </xsl:if>
              <xsl:for-each select="$nodes">
                <xsl:call-template name="get-section-number"/>
              </xsl:for-each>
            </xsl:when>
            <xsl:otherwise>
              <xsl:value-of select="$xref/@x:sec"/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:variable>
        
        <xsl:variable name="secterm">
          <xsl:choose>
            <!-- starts with letter? -->
            <xsl:when test="translate(substring($sec,1,1),$ucase,'')=''">Appendix</xsl:when>
            <xsl:otherwise>Section</xsl:otherwise>
          </xsl:choose>
        </xsl:variable>
  
        <xsl:variable name="fmt">
          <xsl:choose>
            <xsl:when test="$xref/@x:fmt!=''"><xsl:value-of select="$xref/@x:fmt"/></xsl:when>
            <xsl:when test="$xref/ancestor::artwork">,</xsl:when>
            <xsl:otherwise>of</xsl:otherwise>
          </xsl:choose>
        </xsl:variable>
  
        <xsl:variable name="title">
          <xsl:choose>
            <xsl:when test="starts-with($xref/@x:rel,'#') and not($xref/@x:sec) and $node/x:source/@href">
              <xsl:variable name="extdoc" select="document($node/x:source/@href)"/>
              <xsl:variable name="nodes" select="$extdoc//*[@anchor=substring-after($xref//@x:rel,'#')]"/>
              <xsl:if test="not($nodes)">
                <xsl:call-template name="error">
                  <xsl:with-param name="msg">Anchor '<xsl:value-of select="substring-after($xref//@x:rel,'#')"/>' not found in <xsl:value-of select="$node/x:source/@href"/>.</xsl:with-param>
                </xsl:call-template>
              </xsl:if>
              <xsl:for-each select="$nodes">
                <xsl:value-of select="@title"/>
              </xsl:for-each>
            </xsl:when>
            <xsl:otherwise />
          </xsl:choose>
        </xsl:variable>
  
        <!--
        Formats:
        
          ()      [XXXX] (Section SS)
          ,       [XXXX], Section SS
          of      Section SS of [XXXX]
          sec     Section SS
          number  SS
        -->
        
        <xsl:if test="$fmt and not($fmt='()' or $fmt=',' or $fmt='of' or $fmt='sec' or $fmt='anchor' or $fmt='number')">
          <xsl:call-template name="error">
            <xsl:with-param name="msg" select="concat('unknown xref/@x:fmt extension: ',$fmt)"/>
          </xsl:call-template>
        </xsl:if>
  
        <xsl:if test="$sec!=''">
                
          <xsl:choose>
            <xsl:when test="$fmt='of' or $fmt='sec'">
              <xsl:choose>
                <xsl:when test="$href!=''">
                  <a href="{$href}">
                    <xsl:if test="$title!=''">
                      <xsl:attribute name="title"><xsl:value-of select="$title"/></xsl:attribute>
                    </xsl:if>
                    <xsl:if test="$fmt='sec' and $xml2rfc-ext-include-references-in-index='yes'">
                      <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
                    </xsl:if>
                    <xsl:value-of select="$secterm"/>
                    <xsl:text> </xsl:text>
                    <xsl:value-of select="$sec"/>
                  </a>
                </xsl:when>
                <xsl:otherwise><xsl:value-of select="$secterm"/><xsl:text> </xsl:text><xsl:value-of select="$sec"/></xsl:otherwise>
              </xsl:choose>
              <xsl:if test="$fmt='of'">
                <xsl:text> of </xsl:text>
              </xsl:if>
            </xsl:when>
            <xsl:when test="$fmt='number'">
              <xsl:choose>
                <xsl:when test="$href!=''">
                  <a href="{$href}">
                    <xsl:if test="$title!=''">
                      <xsl:attribute name="title"><xsl:value-of select="$title"/></xsl:attribute>
                    </xsl:if>
                    <xsl:if test="$xml2rfc-ext-include-references-in-index='yes'">
                      <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
                    </xsl:if>
                    <xsl:value-of select="$sec"/>
                  </a>
                </xsl:when>
                <xsl:otherwise><xsl:value-of select="$sec"/></xsl:otherwise>
              </xsl:choose>
            </xsl:when>
            <xsl:otherwise />
          </xsl:choose>
        </xsl:if>
  
        <xsl:if test="$sec='' or ($fmt!='sec' and $fmt!='number')">
          <a href="#{$xref/@target}">
            <xsl:if test="$xml2rfc-ext-include-references-in-index='yes'">
              <xsl:attribute name="id"><xsl:value-of select="$anchor"/></xsl:attribute>
            </xsl:if>
            <cite title="{normalize-space($node/front/title)}">
              <xsl:variable name="val">
                <xsl:call-template name="referencename">
                  <xsl:with-param name="node" select="$node" />
                </xsl:call-template>
              </xsl:variable>
              <xsl:choose>
                <xsl:when test="$fmt='anchor'">
                  <!-- remove brackets -->
                  <xsl:value-of select="substring($val,2,string-length($val)-2)"/>
                </xsl:when>
                <xsl:otherwise>
                  <xsl:value-of select="$val"/>
                </xsl:otherwise>
              </xsl:choose>
            </cite>
          </a>
        </xsl:if>
        
        <xsl:if test="$sec!=''">
          <xsl:choose>
            <xsl:when test="$fmt='()'">
              <xsl:text> (</xsl:text>
              <xsl:choose>
                <xsl:when test="$href!=''">
                  <a href="{$href}"><xsl:value-of select="$secterm"/><xsl:text> </xsl:text><xsl:value-of select="$sec"/></a>
                </xsl:when>
                <xsl:otherwise><xsl:value-of select="$secterm"/><xsl:text> </xsl:text><xsl:value-of select="$sec"/></xsl:otherwise>
              </xsl:choose>
              <xsl:text>)</xsl:text>
            </xsl:when>
            <xsl:when test="$fmt=','">
              <xsl:text>, </xsl:text>
              <xsl:choose>
                <xsl:when test="$href!=''">
                  <a href="{$href}">
                    <xsl:if test="$title!=''">
                      <xsl:attribute name="title"><xsl:value-of select="$title"/></xsl:attribute>
                    </xsl:if>
                    <xsl:value-of select="$secterm"/>
                    <xsl:text> </xsl:text>
                    <xsl:value-of select="$sec"/>
                  </a>
                </xsl:when>
                <xsl:otherwise><xsl:value-of select="$secterm"/><xsl:text> </xsl:text><xsl:value-of select="$sec"/></xsl:otherwise>
              </xsl:choose>
            </xsl:when>
            <xsl:otherwise/>
          </xsl:choose>
        </xsl:if>
      </xsl:when>
      
      <xsl:otherwise>
        <xsl:call-template name="error">
          <xsl:with-param name="msg" select="concat('xref to unknown element: ',name($node))"/>
        </xsl:call-template>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:for-each>
</xsl:template>


<!-- mark unmatched elements red -->

<xsl:template match="*">
  <xsl:call-template name="error">
    <xsl:with-param name="inline" select="'no'"/>
    <xsl:with-param name="msg">no XSLT template for element '<xsl:value-of select="name()"/>'</xsl:with-param>
  </xsl:call-template>
  <tt class="error">&lt;<xsl:value-of select="name()" />&gt;</tt>
  <xsl:copy><xsl:apply-templates select="node()|@*" /></xsl:copy>
  <tt class="error">&lt;/<xsl:value-of select="name()" />&gt;</tt>
</xsl:template>

<xsl:template match="/">
  <xsl:apply-templates select="*" />
</xsl:template>

<!-- utility templates -->

<xsl:template name="collectLeftHeaderColumn">
  <xsl:param name="mode" />
  <!-- default case -->
  <xsl:if test="$xml2rfc-private=''">
    <xsl:choose>
      <xsl:when test="/rfc/@number and $header-format='2010' and $submissionType='independent'">
        <myns:item>Independent Submission</myns:item>
      </xsl:when>
      <xsl:when test="/rfc/@number and $header-format='2010' and $submissionType='IETF'">
        <myns:item>Internet Engineering Task Force (IETF)</myns:item>
      </xsl:when>
      <xsl:when test="/rfc/@number and $header-format='2010' and $submissionType='IRTF'">
        <myns:item>Internet Research Task Force (IRTF)</myns:item>
      </xsl:when>
      <xsl:when test="/rfc/@number and $header-format='2010' and $submissionType='IAB'">
        <myns:item>Internet Architecture Board (IAB)</myns:item>
      </xsl:when>
      <xsl:when test="/rfc/front/workgroup and (not(/rfc/@number) or /rfc/@number='')">
        <xsl:for-each select="/rfc/front/workgroup">
          <myns:item><xsl:value-of select="."/></myns:item>
        </xsl:for-each>
      </xsl:when>
      <xsl:otherwise>
        <xsl:if test="starts-with(/rfc/@docName,'draft-ietf-') and not(/rfc/front/workgroup)">
          <xsl:call-template name="info">
            <xsl:with-param name="inline" select="'no'"/>
            <xsl:with-param name="msg">WG submissions should include a /rfc/front/workgroup element</xsl:with-param>
          </xsl:call-template>
        </xsl:if>
        <myns:item>Network Working Group</myns:item>
      </xsl:otherwise>
    </xsl:choose>
    <myns:item>
       <xsl:choose>
        <xsl:when test="/rfc/@ipr and not(/rfc/@number)">Internet-Draft</xsl:when>
        <xsl:otherwise>Request for Comments: <xsl:value-of select="/rfc/@number"/></xsl:otherwise>
      </xsl:choose>
    </myns:item>
    <xsl:if test="/rfc/@obsoletes!=''">
      <myns:item>
        <xsl:text>Obsoletes: </xsl:text>
        <xsl:call-template name="rfclist">
          <xsl:with-param name="list" select="normalize-space(/rfc/@obsoletes)" />
        </xsl:call-template>
        <xsl:if test="not(/rfc/@number)"> (if approved)</xsl:if>
      </myns:item>
    </xsl:if>
    <xsl:if test="/rfc/@seriesNo">
       <myns:item>
        <xsl:choose>
          <xsl:when test="/rfc/@category='bcp'">BCP: <xsl:value-of select="/rfc/@seriesNo" /></xsl:when>
          <xsl:when test="/rfc/@category='info'">FYI: <xsl:value-of select="/rfc/@seriesNo" /></xsl:when>
          <xsl:when test="/rfc/@category='std'">STD: <xsl:value-of select="/rfc/@seriesNo" /></xsl:when>
          <xsl:otherwise><xsl:value-of select="concat(/rfc/@category,': ',/rfc/@seriesNo)" /></xsl:otherwise>
        </xsl:choose>
      </myns:item>
    </xsl:if>
    <xsl:if test="/rfc/@updates!=''">
      <myns:item>
        <xsl:text>Updates: </xsl:text>
          <xsl:call-template name="rfclist">
             <xsl:with-param name="list" select="normalize-space(/rfc/@updates)" />
          </xsl:call-template>
          <xsl:if test="not(/rfc/@number)"> (if approved)</xsl:if>
      </myns:item>
    </xsl:if>
    <myns:item>
      <xsl:choose>
        <xsl:when test="/rfc/@number">
          <xsl:text>Category: </xsl:text>
        </xsl:when>
        <xsl:otherwise>
          <xsl:text>Intended status: </xsl:text>
        </xsl:otherwise>
      </xsl:choose>
      <xsl:call-template name="get-category-long" />
    </myns:item>
    <xsl:if test="/rfc/@ipr and not(/rfc/@number)">
       <myns:item>Expires: <xsl:call-template name="expirydate" /></myns:item>
    </xsl:if>
  </xsl:if>
    
  <!-- private case -->
  <xsl:if test="$xml2rfc-private!=''">
    <myns:item><xsl:value-of select="$xml2rfc-private" /></myns:item>
  </xsl:if>
  
  <xsl:if test="$header-format='2010' and /rfc/@number">
    <myns:item>ISSN: 2070-1721</myns:item>
  </xsl:if>
</xsl:template>

<xsl:template name="collectRightHeaderColumn">
  <xsl:for-each select="author">
    <xsl:variable name="initials">
      <xsl:call-template name="format-initials"/>
    </xsl:variable>
    <xsl:if test="@surname">
      <myns:item>
        <xsl:value-of select="concat($initials,' ',@surname)" />
        <xsl:if test="@role">
          <xsl:choose>
            <xsl:when test="@role='editor'">
              <xsl:text>, Editor</xsl:text>
            </xsl:when>
            <xsl:otherwise>
              <xsl:text>, </xsl:text><xsl:value-of select="@role" />
            </xsl:otherwise>
          </xsl:choose>
        </xsl:if>
      </myns:item>
    </xsl:if>
    <xsl:variable name="org">
      <xsl:choose>
        <xsl:when test="organization/@abbrev"><xsl:value-of select="organization/@abbrev" /></xsl:when>
        <xsl:otherwise><xsl:value-of select="organization" /></xsl:otherwise>
      </xsl:choose>
    </xsl:variable>
    <xsl:variable name="orgOfFollowing">
      <xsl:choose>
        <xsl:when test="following-sibling::*[1]/organization/@abbrev"><xsl:value-of select="following-sibling::*[1]/organization/@abbrev" /></xsl:when>
        <xsl:otherwise><xsl:value-of select="following-sibling::*/organization" /></xsl:otherwise>
      </xsl:choose>
    </xsl:variable>
    <xsl:if test="$org != $orgOfFollowing and $org != ''">
      <myns:item><xsl:value-of select="$org" /></myns:item>
    </xsl:if>
  </xsl:for-each>
  <myns:item>
    <xsl:if test="$xml2rfc-ext-pub-month!=''">
      <xsl:value-of select="$xml2rfc-ext-pub-month" />
      <xsl:if test="$xml2rfc-ext-pub-day!='' and /rfc/@ipr and not(/rfc/@number)">
        <xsl:text> </xsl:text>
        <xsl:value-of select="$xml2rfc-ext-pub-day" />
        <xsl:text>,</xsl:text>
      </xsl:if>
    </xsl:if>
    <xsl:if test="$xml2rfc-ext-pub-day='' and /rfc/@docName and not(substring(/rfc/@docName, string-length(/rfc/@docName) - string-length('-latest') + 1) = '-latest')">
      <xsl:call-template name="warning">
        <xsl:with-param name="msg" select="concat('/rfc/front/date/@day appears to be missing for a historic draft dated ', $pub-yearmonth)"/>
        <xsl:with-param name="inline" select="'no'"/>
      </xsl:call-template>
    </xsl:if>
    <xsl:value-of select="concat(' ',$xml2rfc-ext-pub-year)" />
  </myns:item>
</xsl:template>


<xsl:template name="emitheader">
  <xsl:param name="lc" />
  <xsl:param name="rc" />

  <tbody>
    <xsl:for-each select="$lc/myns:item | $rc/myns:item">
      <xsl:variable name="pos" select="position()" />
      <xsl:if test="$pos &lt; count($lc/myns:item) + 1 or $pos &lt; count($rc/myns:item) + 1"> 
        <tr>
          <td class="left"><xsl:call-template name="copynodes"><xsl:with-param name="nodes" select="$lc/myns:item[$pos]/node()" /></xsl:call-template></td>
          <td class="right"><xsl:call-template name="copynodes"><xsl:with-param name="nodes" select="$rc/myns:item[$pos]/node()" /></xsl:call-template></td>
        </tr>
      </xsl:if>
    </xsl:for-each>
  </tbody>
</xsl:template>

<!-- convenience template that avoids copying namespace nodes we don't want -->
<xsl:template name="copynodes">
  <xsl:param name="nodes" />
  <xsl:for-each select="$nodes">
    <xsl:choose>
      <xsl:when test="namespace-uri()='http://www.w3.org/1999/xhtml'">
        <xsl:element name="{name()}" namespace="{namespace-uri()}">
          <xsl:copy-of select="@*|node()" />
        </xsl:element>
      </xsl:when>
      <xsl:when test="self::*">
        <xsl:element name="{name()}">
          <xsl:copy-of select="@*|node()" />
        </xsl:element>
      </xsl:when>
      <!-- workaround for opera, remove when Opera > 9.0.x comes out -->
      <xsl:when test="self::text()">
        <xsl:value-of select="."/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:copy-of select="." />
      </xsl:otherwise>
    </xsl:choose>
  </xsl:for-each>
</xsl:template>


<xsl:template name="expirydate">
  <xsl:choose>
    <xsl:when test="$xml2rfc-ext-pub-day >= 1">
      <xsl:call-template name="normalize-date">
        <xsl:with-param name="year" select="$xml2rfc-ext-pub-year"/>
        <xsl:with-param name="month" select="$pub-month-numeric"/>
        <xsl:with-param name="day" select="$xml2rfc-ext-pub-day + 185"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="$xml2rfc-ext-pub-month='January'">July <xsl:value-of select="$xml2rfc-ext-pub-year" /></xsl:when>
    <xsl:when test="$xml2rfc-ext-pub-month='February'">August <xsl:value-of select="$xml2rfc-ext-pub-year" /></xsl:when>
    <xsl:when test="$xml2rfc-ext-pub-month='March'">September <xsl:value-of select="$xml2rfc-ext-pub-year" /></xsl:when>
    <xsl:when test="$xml2rfc-ext-pub-month='April'">October <xsl:value-of select="$xml2rfc-ext-pub-year" /></xsl:when>
    <xsl:when test="$xml2rfc-ext-pub-month='May'">November <xsl:value-of select="$xml2rfc-ext-pub-year" /></xsl:when>
    <xsl:when test="$xml2rfc-ext-pub-month='June'">December <xsl:value-of select="$xml2rfc-ext-pub-year" /></xsl:when>
    <xsl:when test="$xml2rfc-ext-pub-month='July'">January <xsl:value-of select="$xml2rfc-ext-pub-year + 1" /></xsl:when>
    <xsl:when test="$xml2rfc-ext-pub-month='August'">February <xsl:value-of select="$xml2rfc-ext-pub-year + 1" /></xsl:when>
    <xsl:when test="$xml2rfc-ext-pub-month='September'">March <xsl:value-of select="$xml2rfc-ext-pub-year + 1" /></xsl:when>
    <xsl:when test="$xml2rfc-ext-pub-month='October'">April <xsl:value-of select="$xml2rfc-ext-pub-year + 1" /></xsl:when>
    <xsl:when test="$xml2rfc-ext-pub-month='November'">May <xsl:value-of select="$xml2rfc-ext-pub-year + 1" /></xsl:when>
    <xsl:when test="$xml2rfc-ext-pub-month='December'">June <xsl:value-of select="$xml2rfc-ext-pub-year + 1" /></xsl:when>
      <xsl:otherwise>WRONG SYNTAX FOR MONTH</xsl:otherwise>
   </xsl:choose>
</xsl:template>

<xsl:template name="normalize-date">
  <xsl:param name="year"/>
  <xsl:param name="month"/>
  <xsl:param name="day"/>

  <xsl:variable name="isleap" select="(($year mod 4) = 0 and ($year mod 100 != 0)) or ($year mod 400) = 0" />

  <!--<xsl:message>
    <xsl:value-of select="concat($year,' ',$month,' ',$day)"/>
  </xsl:message>-->
  
  <xsl:variable name="dim">
    <xsl:choose>
      <xsl:when test="$month=1 or $month=3 or $month=5 or $month=7 or $month=8 or $month=10 or $month=12">31</xsl:when>
      <xsl:when test="$month=2 and $isleap">29</xsl:when>
      <xsl:when test="$month=2 and not($isleap)">28</xsl:when>
      <xsl:otherwise>30</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  
  <xsl:choose>
    <xsl:when test="$day > $dim and $month=12">
      <xsl:call-template name="normalize-date">
        <xsl:with-param name="year" select="$year + 1"/>
        <xsl:with-param name="month" select="1"/>
        <xsl:with-param name="day" select="$day - $dim"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="$day > $dim">
      <xsl:call-template name="normalize-date">
        <xsl:with-param name="year" select="$year"/>
        <xsl:with-param name="month" select="$month + 1"/>
        <xsl:with-param name="day" select="$day - $dim"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="get-month-as-name">
        <xsl:with-param name="month" select="$month"/>
      </xsl:call-template>
      <xsl:value-of select="concat(' ',$day,', ',$year)"/>
    </xsl:otherwise>
  </xsl:choose>

</xsl:template>
  
<xsl:template name="get-month-as-num">
  <xsl:param name="month" />
  <xsl:choose>
    <xsl:when test="$month='January'">01</xsl:when>
    <xsl:when test="$month='February'">02</xsl:when>
    <xsl:when test="$month='March'">03</xsl:when>
    <xsl:when test="$month='April'">04</xsl:when>
    <xsl:when test="$month='May'">05</xsl:when>
    <xsl:when test="$month='June'">06</xsl:when>
    <xsl:when test="$month='July'">07</xsl:when>
    <xsl:when test="$month='August'">08</xsl:when>
    <xsl:when test="$month='September'">09</xsl:when>
    <xsl:when test="$month='October'">10</xsl:when>
    <xsl:when test="$month='November'">11</xsl:when>
    <xsl:when test="$month='December'">12</xsl:when>
    <xsl:otherwise>WRONG SYNTAX FOR MONTH</xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-month-as-name">
  <xsl:param name="month"/>
  <xsl:choose>
    <xsl:when test="$month=1">January</xsl:when>
    <xsl:when test="$month=2">February</xsl:when>
    <xsl:when test="$month=3">March</xsl:when>
    <xsl:when test="$month=4">April</xsl:when>
    <xsl:when test="$month=5">May</xsl:when>
    <xsl:when test="$month=6">June</xsl:when>
    <xsl:when test="$month=7">July</xsl:when>
    <xsl:when test="$month=8">August</xsl:when>
    <xsl:when test="$month=9">September</xsl:when>
    <xsl:when test="$month=10">October</xsl:when>
    <xsl:when test="$month=11">November</xsl:when>
    <xsl:when test="$month=12">December</xsl:when>
    <xsl:otherwise>WRONG SYNTAX FOR MONTH</xsl:otherwise>
   </xsl:choose>
</xsl:template>

<!-- produce back section with author information -->
<xsl:template name="get-authors-section-title">
  <xsl:choose>
    <xsl:when test="count(/rfc/front/author)=1">Author's Address</xsl:when>
    <xsl:otherwise>Authors' Addresses</xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-authors-section-number">
  <xsl:if test="/*/x:assign-section-number[@builtin-target='authors']">
    <xsl:value-of select="/*/x:assign-section-number[@builtin-target='authors']/@number"/>
  </xsl:if>
</xsl:template>

<xsl:template name="insertAuthors">

  <xsl:variable name="number">
    <xsl:call-template name="get-authors-section-number"/>
  </xsl:variable>
    
  <xsl:if test="$number!='suppress'">
    <xsl:call-template name="insert-conditional-hrule"/>
    
    <div class="avoidbreak">
      <h1 id="{$anchor-prefix}.authors">
        <xsl:call-template name="insert-conditional-pagebreak"/>
        <xsl:if test="$number != ''">
          <a href="#{$anchor-prefix}.section.{$number}" id="{$anchor-prefix}.section.{$number}"><xsl:value-of select="$number"/>.</a>
          <xsl:text> </xsl:text>
        </xsl:if>
        <a href="#{$anchor-prefix}.authors"><xsl:call-template name="get-authors-section-title"/></a>
      </h1>
    
      <xsl:apply-templates select="/rfc/front/author" />
    </div>
  </xsl:if>
</xsl:template>



<!-- insert copyright statement -->

<xsl:template name="insertCopyright" myns:namespaceless-elements="xml2rfc">

  <xsl:if test="not($no-copylong)">
    <section title="Full Copyright Statement" anchor="{$anchor-prefix}.copyright" myns:unnumbered="unnumbered" myns:notoclink="notoclink">
      <xsl:choose>
        <xsl:when test="$ipr-rfc3667">
          <t>
            <xsl:choose>
              <xsl:when test="$ipr-rfc4748">
                Copyright &#169; The IETF Trust (<xsl:value-of select="$xml2rfc-ext-pub-year" />).
              </xsl:when>
              <xsl:otherwise>
                Copyright &#169; The Internet Society (<xsl:value-of select="$xml2rfc-ext-pub-year" />).
              </xsl:otherwise>
            </xsl:choose>
          </t>
          <t>
            This document is subject to the rights, licenses and restrictions
            contained in BCP 78<xsl:if test="$submissionType='independent'"> and at <eref target="http://www.rfc-editor.org/copyright.html">http://www.rfc-editor.org/copyright.html</eref></xsl:if>, and except as set forth therein, the authors
            retain all their rights.
          </t>
          <t>
            This document and the information contained herein are provided
            on an &#8220;AS IS&#8221; basis and THE CONTRIBUTOR,
            THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY),
            THE INTERNET SOCIETY<xsl:if test="$ipr-rfc4748">, THE IETF TRUST</xsl:if>
            AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES,
            EXPRESS OR IMPLIED,
            INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
            INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
            WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
          </t>
        </xsl:when>
        <xsl:otherwise>
          <!-- <http://tools.ietf.org/html/rfc2026#section-10.4> -->
          <t>
            Copyright &#169; The Internet Society (<xsl:value-of select="$xml2rfc-ext-pub-year" />). All Rights Reserved.
          </t>
          <t>
            This document and translations of it may be copied and furnished to
            others, and derivative works that comment on or otherwise explain it
            or assist in its implementation may be prepared, copied, published and
            distributed, in whole or in part, without restriction of any kind,
            provided that the above copyright notice and this paragraph are
            included on all such copies and derivative works. However, this
            document itself may not be modified in any way, such as by removing
            the copyright notice or references to the Internet Society or other
            Internet organizations, except as needed for the purpose of
            developing Internet standards in which case the procedures for
            copyrights defined in the Internet Standards process must be
            followed, or as required to translate it into languages other than
            English.
          </t>
          <t>
            The limited permissions granted above are perpetual and will not be
            revoked by the Internet Society or its successors or assigns.
          </t>
          <t>
            This document and the information contained herein is provided on an
            &#8220;AS IS&#8221; basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
            TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
            BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
            HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
            MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
          </t>
        </xsl:otherwise>
      </xsl:choose>
    </section>
    
    <section title="Intellectual Property" anchor="{$anchor-prefix}.ipr" myns:unnumbered="unnumbered">
      <xsl:choose>
        <xsl:when test="$ipr-rfc3667">
          <t>
            The IETF takes no position regarding the validity or scope of any
            Intellectual Property Rights or other rights that might be claimed to
            pertain to the implementation or use of the technology described in
            this document or the extent to which any license under such rights
            might or might not be available; nor does it represent that it has
            made any independent effort to identify any such rights.  Information
            on the procedures with respect to rights in RFC documents
            can be found in BCP 78 and BCP 79.
          </t>       
          <t>
            Copies of IPR disclosures made to the IETF Secretariat and any
            assurances of licenses to be made available, or the result of an
            attempt made to obtain a general license or permission for the use
            of such proprietary rights by implementers or users of this
            specification can be obtained from the IETF on-line IPR repository 
            at <eref target="http://www.ietf.org/ipr">http://www.ietf.org/ipr</eref>.
          </t>       
          <t>
            The IETF invites any interested party to bring to its attention any
            copyrights, patents or patent applications, or other proprietary
            rights that may cover technology that may be required to implement
            this standard. Please address the information to the IETF at
            <eref target="mailto:ietf-ipr@ietf.org">ietf-ipr@ietf.org</eref>.
          </t>       
        </xsl:when>
        <xsl:otherwise>
          <t>
            The IETF takes no position regarding the validity or scope of
            any intellectual property or other rights that might be claimed
            to  pertain to the implementation or use of the technology
            described in this document or the extent to which any license
            under such rights might or might not be available; neither does
            it represent that it has made any effort to identify any such
            rights. Information on the IETF's procedures with respect to
            rights in standards-track and standards-related documentation
            can be found in BCP-11. Copies of claims of rights made
            available for publication and any assurances of licenses to
            be made available, or the result of an attempt made
            to obtain a general license or permission for the use of such
            proprietary rights by implementors or users of this
            specification can be obtained from the IETF Secretariat.
          </t>
          <t>
            The IETF invites any interested party to bring to its
            attention any copyrights, patents or patent applications, or
            other proprietary rights which may cover technology that may be
            required to practice this standard. Please address the
            information to the IETF Executive Director.
          </t>
          <xsl:if test="$xml2rfc-iprnotified='yes'">
            <t>
              The IETF has been notified of intellectual property rights
              claimed in regard to some or all of the specification contained
              in this document. For more information consult the online list
              of claimed rights.
            </t>
          </xsl:if>
        </xsl:otherwise>
      </xsl:choose>
    </section>
    
    <xsl:choose>
      <xsl:when test="$no-funding"/>
      <xsl:when test="$funding1 and /rfc/@number">
        <section myns:unnumbered="unnumbered" myns:notoclink="notoclink">
          <xsl:attribute name="title">
            <xsl:choose>
              <xsl:when test="$xml2rfc-rfcedstyle='yes'">Acknowledgement</xsl:when>
              <xsl:otherwise>Acknowledgment</xsl:otherwise>
            </xsl:choose>
          </xsl:attribute>
          <t>
            Funding for the RFC Editor function is provided by the IETF
            Administrative Support Activity (IASA).
          </t>
        </section>
      </xsl:when>
      <xsl:when test="$funding0 and /rfc/@number">
        <section myns:unnumbered="unnumbered" myns:notoclink="notoclink">
          <xsl:attribute name="title">
            <xsl:choose>
              <xsl:when test="$xml2rfc-rfcedstyle='yes'">Acknowledgement</xsl:when>
              <xsl:otherwise>Acknowledgment</xsl:otherwise>
            </xsl:choose>
          </xsl:attribute>
          <t>
            Funding for the RFC Editor function is currently provided by
            the Internet Society.
          </t>
        </section>
      </xsl:when>
      <xsl:otherwise/>
    </xsl:choose>
  </xsl:if>

</xsl:template>


<!-- insert CSS style info -->

<xsl:template name="insertCss">
<style type="text/css" title="Xml2Rfc (sans serif)">
a {
  text-decoration: none;
}
a.smpl {
  color: black;
}
a:hover {
  text-decoration: underline;
}
a:active {
  text-decoration: underline;
}
address {
  margin-top: 1em;
  margin-left: 2em;
  font-style: normal;
}<xsl:if test="//x:blockquote">
blockquote {
  border-style: solid;
  border-color: gray;
  border-width: 0 0 0 .25em;
  font-style: italic;
  padding-left: 0.5em;
}</xsl:if>
body {<xsl:if test="$xml2rfc-background!=''">
  background: url(<xsl:value-of select="$xml2rfc-background" />) #ffffff left top;</xsl:if>
  color: black;
  font-family: verdana, helvetica, arial, sans-serif;
  font-size: 10pt;
}<xsl:if test="//xhtml:p">
br.p {
  line-height: 150%;
}</xsl:if>
cite {
  font-style: normal;
}<xsl:if test="//x:note">
div.note {
  margin-left: 2em;
}</xsl:if>
dd {
  margin-right: 2em;<xsl:if test="$xml2rfc-ext-justification='always'">
  text-align: justify;</xsl:if>
}
dl {
  margin-left: 2em;
}
<!-- spacing between two entries in definition lists -->
ul.empty {
  list-style-type: none;
}
ul.empty li {
  margin-top: .5em;
}
dl p {
  margin-left: 0em;
}
dt {
  margin-top: .5em;
}
h1 {
  font-size: 14pt;
  line-height: 21pt;
  page-break-after: avoid;
}
h1.np {
  page-break-before: always;
}
h1 a {
  color: #333333;
}
h2 {
  font-size: 12pt;
  line-height: 15pt;
  page-break-after: avoid;
}
h3, h4, h5, h6 {
  font-size: 10pt;
  page-break-after: avoid;
}
h2 a, h3 a, h4 a, h5 a, h6 a {
  color: black;
}
img {
  margin-left: 3em;
}
li {
  margin-left: 2em;
  margin-right: 2em;<xsl:if test="$xml2rfc-ext-justification='always'">
  text-align: justify;</xsl:if>
}
ol {
  margin-left: 2em;
  margin-right: 2em;
}
ol p {
  margin-left: 0em;
}<xsl:if test="//xhtml:q">
q {
  font-style: italic;
}</xsl:if>
p {
  margin-left: 2em;
  margin-right: 2em;<xsl:if test="$xml2rfc-ext-justification='always'">
  text-align: justify;</xsl:if>
}
pre {
  margin-left: 3em;
  background-color: lightyellow;
  padding: .25em;
}<xsl:if test="//artwork[@x:isCodeComponent='yes']"><!-- support "<CODE BEGINS>" and "<CODE ENDS>" markers-->
pre.ccmarker {
  background-color: white;
  color: gray;
}
pre.ccmarker > span {
  font-size: small;
}
pre.cct {
  margin-bottom: -1em;
}
pre.ccb {
  margin-top: -1em;
}</xsl:if>
pre.text2 {
  border-style: dotted;
  border-width: 1px;
  background-color: #f0f0f0;
  width: 69em;
}
pre.inline {
  background-color: white;
  padding: 0em;
}
pre.text {
  border-style: dotted;
  border-width: 1px;
  background-color: #f8f8f8;
  width: 69em;
}
pre.drawing {
  border-style: solid;
  border-width: 1px;
  background-color: #f8f8f8;
  padding: 2em;
}<xsl:if test="//x:q">
q {
  font-style: italic;
}</xsl:if>
<xsl:if test="//x:sup">
sup {
  font-size: 60%;
}</xsl:if>
table {
  margin-left: 2em;
}<xsl:if test="//texttable">
table.tt {
  vertical-align: top;
}
table.full {
  border-style: outset;
  border-width: 1px;
}
table.headers {
  border-style: outset;
  border-width: 1px;
}
table.tt td {
  vertical-align: top;
}
table.full td {
  border-style: inset;
  border-width: 1px;
}
table.tt th {
  vertical-align: top;
}
table.full th {
  border-style: inset;
  border-width: 1px;
}
table.headers th {
  border-style: none none inset none;
  border-width: 1px;
}
table.left {
  margin-right: auto;
}
table.right {
  margin-left: auto;
}
table.center {
  margin-left: auto;
  margin-right: auto;
}
caption {
  caption-side: bottom;
  font-weight: bold;
  font-size: 9pt;
  margin-top: .5em;
}
</xsl:if>
table.header {
  border-spacing: 1px;
  width: 95%;
  font-size: 10pt;
  color: white;
}
td.top {
  vertical-align: top;
}
td.topnowrap {
  vertical-align: top;
  white-space: nowrap; 
}
table.header td {
  background-color: gray;
  width: 50%;
}<xsl:if test="/rfc/@obsoletes | /rfc/@updates">
table.header a {
  color: white;
}</xsl:if>
td.reference {
  vertical-align: top;
  white-space: nowrap;
  padding-right: 1em;
}
thead {
  display:table-header-group;
}
ul.toc {
  list-style: none;
  margin-left: 1.5em;
  margin-right: 0em;
  padding-left: 0em;
}
li.tocline0 {
  line-height: 150%;
  font-weight: bold;
  font-size: 10pt;
  margin-left: 0em;
  margin-right: 0em;
}
li.tocline1 {
  line-height: normal;
  font-weight: normal;
  font-size: 9pt;
  margin-left: 0em;
  margin-right: 0em;
}
li.tocline2 {
  font-size: 0pt;
}
ul p {
  margin-left: 0em;
}
<xsl:if test="$has-index">ul.ind {
  list-style: none;
  margin-left: 1.5em;
  margin-right: 0em;
  padding-left: 0em;
  page-break-before: avoid;
}
li.indline0 {
  font-weight: bold;
  line-height: 200%;
  margin-left: 0em;
  margin-right: 0em;
}
li.indline1 {
  font-weight: normal;
  line-height: 150%;
  margin-left: 0em;
  margin-right: 0em;
}
.avoidbreak {
  page-break-inside: avoid;
}
</xsl:if><xsl:if test="//x:bcp14">.bcp14 {
  font-style: normal;
  text-transform: lowercase;
  font-variant: small-caps;
}</xsl:if><xsl:if test="//x:blockquote">
blockquote > * .bcp14 {
  font-style: italic;
}</xsl:if>
.comment {
  background-color: yellow;
}<xsl:if test="$xml2rfc-editing='yes'">
.editingmark {
  background-color: khaki;
}</xsl:if>
.center {
  text-align: center;
}
.error {
  color: red;
  font-style: italic;
  font-weight: bold;
}
.figure {
  font-weight: bold;
  text-align: center;
  font-size: 9pt;
}
.filename {
  color: #333333;
  font-weight: bold;
  font-size: 12pt;
  line-height: 21pt;
  text-align: center;
}
.fn {
  font-weight: bold;
}
.hidden {
  display: none;
}
.left {
  text-align: left;
}
.right {
  text-align: right;
}
.title {
  color: #990000;
  font-size: 18pt;
  line-height: 18pt;
  font-weight: bold;
  text-align: center;
  margin-top: 36pt;
}
.vcardline {
  display: block;
}
.warning {
  font-size: 14pt;
  background-color: yellow;
}
<xsl:if test="$has-edits">del {
  color: red;
  text-decoration: line-through;
}
.del {
  color: red;
  text-decoration: line-through;
}
ins {
  color: green;
  text-decoration: underline;
}
.ins {
  color: green;
  text-decoration: underline;
}
div.issuepointer {
  float: left;
}</xsl:if><xsl:if test="//ed:issue">
table.openissue {
  background-color: khaki;
  border-width: thin;
  border-style: solid;
  border-color: black;
}
table.closedissue {
  background-color: white;
  border-width: thin;
  border-style: solid;
  border-color: gray;
  color: gray; 
}
thead th {
  text-align: left;
}
.bg-issue {
  border: solid;
  border-width: 1px;
  font-size: 7pt;
}
.closed-issue {
  border: solid;
  border-width: thin;
  background-color: lime;
  font-size: smaller;
  font-weight: bold;
}
.open-issue {
  border: solid;
  border-width: thin;
  background-color: red;
  font-size: smaller;
  font-weight: bold;
}
.editor-issue {
  border: solid;
  border-width: thin;
  background-color: yellow;
  font-size: smaller;
  font-weight: bold;
}</xsl:if>

@media print {
  .noprint {
    display: none;
  }
  
  a {
    color: black;
    text-decoration: none;
  }

  table.header {
    width: 90%;
  }

  td.header {
    width: 50%;
    color: black;
    background-color: white;
    vertical-align: top;
    font-size: 12pt;
  }

  ul.toc a::after {
    content: leader('.') target-counter(attr(href), page);
  }
  
  a.iref {
    content: target-counter(attr(href), page);
  }
  
  .print2col {
    column-count: 2;
    -moz-column-count: 2;<!-- for Firefox -->
    column-fill: auto;<!-- for PrinceXML -->
  }
<xsl:if test="$xml2rfc-ext-justification='print'">
  dd {
    text-align: justify;
  }
  li {
    text-align: justify;
  }
  p {
    text-align: justify;
  }
</xsl:if>}
<xsl:choose><xsl:when test="$xml2rfc-ext-duplex='yes'">
@page:right {
  @top-left {
       content: "<xsl:call-template name="get-header-left"/>"; 
  } 
  @top-right {
       content: "<xsl:call-template name="get-header-right"/>"; 
  } 
  @top-center {
       content: "<xsl:call-template name="get-header-center"/>"; 
  } 
  @bottom-left {
       content: "<xsl:call-template name="get-author-summary"/>"; 
  } 
  @bottom-center {
       content: "<xsl:call-template name="get-category-long"/>"; 
  } 
  @bottom-right {
       content: "[Page " counter(page) "]"; 
  } 
}
@page:left {
  @top-left {
       content: "<xsl:call-template name="get-header-right"/>"; 
  } 
  @top-right {
       content: "<xsl:call-template name="get-header-left"/>"; 
  } 
  @top-center {
       content: "<xsl:call-template name="get-header-center"/>"; 
  } 
  @bottom-left {
       content: "[Page " counter(page) "]"; 
  } 
  @bottom-center {
       content: "<xsl:call-template name="get-category-long"/>"; 
  } 
  @bottom-right {
       content: "<xsl:call-template name="get-author-summary"/>"; 
  } 
}
</xsl:when><xsl:otherwise>
@page {
  @top-left {
       content: "<xsl:call-template name="get-header-left"/>"; 
  } 
  @top-right {
       content: "<xsl:call-template name="get-header-right"/>"; 
  } 
  @top-center {
       content: "<xsl:call-template name="get-header-center"/>"; 
  } 
  @bottom-left {
       content: "<xsl:call-template name="get-author-summary"/>"; 
  } 
  @bottom-center {
       content: "<xsl:call-template name="get-category-long"/>"; 
  } 
  @bottom-right {
       content: "[Page " counter(page) "]"; 
  } 
}
</xsl:otherwise></xsl:choose>
@page:first { 
    @top-left {
      content: normal;
    }
    @top-right {
      content: normal;
    }
    @top-center {
      content: normal;
    }
}
</style>
</xsl:template>


<!-- generate the index section -->

<xsl:template name="insertSingleIref">
  <xsl:choose>
    <xsl:when test="@ed:xref">
      <!-- special index generator mode -->
      <xsl:text>[</xsl:text>
      <a href="#{@ed:xref}"><xsl:value-of select="@ed:xref"/></a>
      <xsl:text>, </xsl:text>
      <a>
        <xsl:variable name="htmluri" select="//reference[@anchor=current()/@ed:xref]/format[@type='HTML']/@target"/>
        <xsl:if test="$htmluri">
          <xsl:attribute name="href"><xsl:value-of select="concat($htmluri,'#',@ed:frag)"/></xsl:attribute>
        </xsl:if>       
        <xsl:choose>
          <xsl:when test="@primary='true'"><b><xsl:value-of select="@ed:label" /></b></xsl:when>
          <xsl:otherwise><xsl:value-of select="@ed:label" /></xsl:otherwise>
        </xsl:choose>
      </a>
      <xsl:text>]</xsl:text>
      <xsl:if test="position()!=last()">, </xsl:if>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="_n">
        <xsl:call-template name="get-section-number" />
      </xsl:variable>
      <xsl:variable name="n">
        <xsl:choose>
          <xsl:when test="$_n!=''">
            <xsl:value-of select="$_n"/>
          </xsl:when>
          <xsl:otherwise>&#167;</xsl:otherwise>
        </xsl:choose>
      </xsl:variable>
      <xsl:variable name="backlink">
        <xsl:choose>
          <xsl:when test="self::xref">
            <xsl:variable name="target" select="@target"/>
            <xsl:text>#</xsl:text>
            <xsl:value-of select="$anchor-prefix"/>
            <xsl:text>.xref.</xsl:text>
            <xsl:value-of select="@target"/>.<xsl:number level="any" count="xref[@target=$target]"/>
          </xsl:when>
          <xsl:when test="self::iref">
            <xsl:text>#</xsl:text>
            <xsl:call-template name="compute-iref-anchor"/>
          </xsl:when>
          <xsl:when test="self::x:ref">
            <xsl:text>#</xsl:text>
            <xsl:call-template name="compute-extref-anchor"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:message>Unsupported element type for insertSingleIref</xsl:message>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:variable>
      <a class="iref" href="{$backlink}">
        <xsl:call-template name="insertInsDelClass"/>
        <xsl:choose>
          <xsl:when test="@primary='true'"><b><xsl:value-of select="$n"/></b></xsl:when>
          <xsl:otherwise><xsl:value-of select="$n"/></xsl:otherwise>
        </xsl:choose>
      </a>
      <xsl:if test="position()!=last()">, </xsl:if>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="insertSingleXref">
  <xsl:variable name="_n">
    <xsl:call-template name="get-section-number" />
  </xsl:variable>
  <xsl:variable name="n">
    <xsl:choose>
      <xsl:when test="$_n!=''">
        <xsl:value-of select="$_n"/>
      </xsl:when>
      <xsl:otherwise>&#167;</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <xsl:choose>
    <xsl:when test="self::reference">
      <a class="iref" href="#{@anchor}">
        <xsl:call-template name="insertInsDelClass"/>
        <b><xsl:value-of select="$n"/></b>
      </a>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="target" select="@target"/>
      <xsl:variable name="backlink">#<xsl:value-of select="$anchor-prefix"/>.xref.<xsl:value-of select="$target"/>.<xsl:number level="any" count="xref[@target=$target]"/></xsl:variable>
      <a class="iref" href="{$backlink}">
        <xsl:call-template name="insertInsDelClass"/>
        <xsl:value-of select="$n"/>
      </a>
    </xsl:otherwise>
  </xsl:choose>
  <xsl:if test="position()!=last()">, </xsl:if>
</xsl:template>

<xsl:template name="insertIndex">

  <xsl:call-template name="insert-conditional-hrule"/>

  <h1 id="{$anchor-prefix}.index">
    <xsl:call-template name="insert-conditional-pagebreak"/>
    <a href="#{$anchor-prefix}.index">Index</a>
  </h1>
  
  <!-- generate navigation links to index subsections -->
  <p class="noprint">
    <xsl:variable name="irefs" select="//iref[generate-id(.) = generate-id(key('index-first-letter',translate(substring(@item,1,1),$lcase,$ucase)))]"/>
    <xsl:variable name="xrefs" select="//reference[not(starts-with(@anchor,'deleted-'))][generate-id(.) = generate-id(key('index-first-letter',translate(substring(@anchor,1,1),$lcase,$ucase)))]"/>
  
    <xsl:for-each select="$irefs | $xrefs">
    
      <xsl:sort select="translate(concat(@item,@anchor),$lcase,$ucase)" />
          
      <xsl:variable name="letter" select="translate(substring(concat(@item,@anchor),1,1),$lcase,$ucase)"/>

      <!-- character? -->
      <xsl:if test="translate($letter,concat($lcase,$ucase,'0123456789'),'')=''">
      
        <xsl:variable name="showit">
          <xsl:choose>
            <xsl:when test="$xml2rfc-ext-include-references-in-index!='yes'">
              <xsl:if test="$irefs[starts-with(translate(@item,$lcase,$ucase),$letter)]">
                <xsl:text>yes</xsl:text>
              </xsl:if>
            </xsl:when>
            <xsl:otherwise>
              <xsl:text>yes</xsl:text>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:variable>
        
        <xsl:if test="$showit='yes'">
          <a href="#{$anchor-prefix}.index.{$letter}">
            <xsl:value-of select="$letter" />
          </a>
          <xsl:text> </xsl:text>
        </xsl:if>
      
      </xsl:if>

    </xsl:for-each>
  </p>

  <!-- for each index subsection -->
  <div class="print2col">
  <ul class="ind">
    <xsl:variable name="irefs2" select="//iref[generate-id(.) = generate-id(key('index-first-letter',translate(substring(@item,1,1),$lcase,$ucase)))]"/>
    <xsl:variable name="xrefs2" select="//reference[not(starts-with(@anchor,'deleted-'))][generate-id(.) = generate-id(key('index-first-letter',translate(substring(@anchor,1,1),$lcase,$ucase)))]"/>
  
    <xsl:for-each select="$irefs2 | $xrefs2">
      <xsl:sort select="translate(concat(@item,@anchor),$lcase,$ucase)" />
      <xsl:variable name="letter" select="translate(substring(concat(@item,@anchor),1,1),$lcase,$ucase)"/>
            
      <xsl:variable name="showit">
        <xsl:choose>
          <xsl:when test="$xml2rfc-ext-include-references-in-index!='yes'">
            <xsl:if test="$irefs2[starts-with(translate(@item,$lcase,$ucase),$letter)]">
              <xsl:text>yes</xsl:text>
            </xsl:if>
          </xsl:when>
          <xsl:otherwise>
            <xsl:text>yes</xsl:text>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:variable>

      <xsl:if test="$showit='yes'">
        <li class="indline0">
          
          <!-- make letters and digits stand out -->
          <xsl:choose>
            <xsl:when test="translate($letter,concat($lcase,$ucase,'0123456789'),'')=''">
              <a id="{$anchor-prefix}.index.{$letter}" href="#{$anchor-prefix}.index.{$letter}">
                <b><xsl:value-of select="$letter" /></b>
              </a>
            </xsl:when>
            <xsl:otherwise>
              <b><xsl:value-of select="$letter" /></b>
            </xsl:otherwise>
          </xsl:choose>
        
          <ul class="ind">  
            <xsl:for-each select="key('index-first-letter',translate(substring(concat(@item,@anchor),1,1),$lcase,$ucase))">
        
              <xsl:sort select="translate(concat(@item,@anchor),$lcase,$ucase)" />
              
                <xsl:choose>
                  <xsl:when test="self::reference">
                    <xsl:if test="$xml2rfc-ext-include-references-in-index='yes' and not(starts-with(@anchor,'deleted-'))">
                      <li class="indline1">
                        <em>
                          <xsl:value-of select="@anchor"/>
                        </em>
                        <xsl:text>&#160;&#160;</xsl:text>
                        
                        <xsl:variable name="rs" select="key('xref-item',current()/@anchor) | . | key('anchor-item',concat('deleted-',current()/@anchor))"/>
                        
                        <xsl:for-each select="$rs">
                          <xsl:call-template name="insertSingleXref" />
                        </xsl:for-each>

                        <xsl:variable name="rs2" select="$rs[@x:sec]"/>

                        <xsl:if test="$rs2">
                          <ul class="ind">  
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            By submitting this Internet-Draft, each author represents 
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          <!-- as of Nov 2008, Feb 2009 and Sep 2009 -->
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          <xsl:when test="/rfc/@ipr = 'noDerivativesTrust200811'">
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          <xsl:when test="/rfc/@ipr = 'noModificationTrust200902'">
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      <t>
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            <xsl:when test="(not(/rfc/@consensus) or /rfc/@consensus='yes') and /rfc/front/workgroup!=''">
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              publication of this document.  Please review these documents
              carefully, as they describe your rights and restrictions with respect
              to this document.
            </t>
          </xsl:otherwise>
        </xsl:choose>
        
        <!-- special case: RFC5378 escape applies to RFCs as well -->
        <!-- for IDs historically in Status Of This Memo, over here starting 2009-11 -->
        <xsl:if test="(/rfc/@number or $pub-yearmonth >= 200911) and /rfc/@ipr = 'pre5378Trust200902'">
          <t>
            <xsl:value-of select="$escapeclause"/>
          </t>
        </xsl:if>
        
      </section>
    </xsl:when>
    <xsl:when test="$ipr-2007-08">
      <!-- no copyright notice -->
    </xsl:when>
    <xsl:when test="$ipr-rfc4748">
      <section title="Copyright Notice" myns:unnumbered="unnumbered" myns:notoclink="notoclink" anchor="{$anchor-prefix}.copyrightnotice">
        <t>
          Copyright &#169; The IETF Trust (<xsl:value-of select="$xml2rfc-ext-pub-year" />).  All Rights Reserved.
        </t>
      </section>
    </xsl:when>
    <xsl:otherwise>
      <section title="Copyright Notice" myns:unnumbered="unnumbered" myns:notoclink="notoclink" anchor="{$anchor-prefix}.copyrightnotice">
        <t>
          Copyright &#169; The Internet Society (<xsl:value-of select="$xml2rfc-ext-pub-year" />).  All Rights Reserved.
        </t>
      </section>
    </xsl:otherwise>
  </xsl:choose>
  
</xsl:template>

<!-- TOC generation -->

<xsl:template match="/" mode="toc">
  <hr class="noprint"/>

  <h1 class="np" id="{$anchor-prefix}.toc"> <!-- this pagebreak occurs always -->
    <a href="#{$anchor-prefix}.toc">Table of Contents</a>
  </h1>

  <ul class="toc">
    <xsl:apply-templates mode="toc" />
  </ul>
</xsl:template>

<xsl:template name="insert-toc-line">
  <xsl:param name="number" />
  <xsl:param name="target" />
  <xsl:param name="title" />
  <xsl:param name="tocparam" />
  <xsl:param name="oldtitle" />
  <xsl:param name="waschanged" />

  <!-- handle tocdepth parameter -->
  <xsl:choose>
    <xsl:when test="($tocparam='' or $tocparam='default') and string-length(translate($number,'.ABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890&#167;','.')) &gt;= $parsedTocDepth">
      <!-- dropped entry because excluded -->
      <xsl:attribute name="class">tocline2</xsl:attribute>
    </xsl:when>
    <xsl:when test="$tocparam='exclude'">
      <!-- dropped entry because excluded -->
      <xsl:attribute name="class">tocline2</xsl:attribute>
    </xsl:when>
    <xsl:otherwise>
      <xsl:choose>
        <xsl:when test="starts-with($number,'del-')">
          <del>
            <xsl:value-of select="$number" />
            <a href="#{$target}"><xsl:value-of select="$title"/></a>
          </del>
        </xsl:when>
        <xsl:otherwise>
          <xsl:choose>
            <xsl:when test="not(contains($number,'.'))">
              <xsl:attribute name="class">tocline0</xsl:attribute>
            </xsl:when>
            <xsl:otherwise>
              <xsl:attribute name="class">tocline1</xsl:attribute>
            </xsl:otherwise>
          </xsl:choose>
          <xsl:if test="$number != '' and not(contains($number,'unnumbered-'))">
            <xsl:call-template name="emit-section-number">
              <xsl:with-param name="no" select="$number"/>
            </xsl:call-template>
            <xsl:text>&#160;&#160;&#160;</xsl:text>
          </xsl:if>
          <a href="#{$target}">
            <xsl:choose>
              <xsl:when test="$waschanged!=''">
                <ins><xsl:value-of select="$title"/></ins>
                <del><xsl:value-of select="$oldtitle"/></del>
              </xsl:when>
              <xsl:otherwise>
                <xsl:value-of select="$title"/>
              </xsl:otherwise>
            </xsl:choose>
          </a>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="back-toc">

  <xsl:if test="//cref and $xml2rfc-comments='yes' and $xml2rfc-inline!='yes'">
    <li>
      <xsl:call-template name="insert-toc-line">
        <xsl:with-param name="target" select="concat($anchor-prefix,'.comments')"/>
        <xsl:with-param name="title" select="'Editorial Comments'"/>
      </xsl:call-template>
    </li>
  </xsl:if>

  <xsl:if test="$xml2rfc-ext-authors-section!='end'">
    <xsl:apply-templates select="/rfc/front" mode="toc" />
  </xsl:if>
  <xsl:apply-templates select="back/*[not(self::references)]" mode="toc" />

  <!-- insert the index if index entries exist -->
  <xsl:if test="$has-index">
    <li>
      <xsl:call-template name="insert-toc-line">
        <xsl:with-param name="target" select="concat($anchor-prefix,'.index')"/>
        <xsl:with-param name="title" select="'Index'"/>
      </xsl:call-template>
    </li>
  </xsl:if>

  <xsl:if test="$xml2rfc-ext-authors-section='end'">
    <xsl:apply-templates select="/rfc/front" mode="toc" />
  </xsl:if>

  <!-- copyright statements -->
  <xsl:if test="$xml2rfc-private='' and not($no-copylong)">
    <li>
      <xsl:call-template name="insert-toc-line">
        <xsl:with-param name="target" select="concat($anchor-prefix,'.ipr')"/>
        <xsl:with-param name="title" select="'Intellectual Property and Copyright Statements'"/>
      </xsl:call-template>
    </li>
  </xsl:if>
  
</xsl:template>

<xsl:template match="front" mode="toc">
  
  <xsl:variable name="authors-title">
    <xsl:call-template name="get-authors-section-title"/>
  </xsl:variable>
  <xsl:variable name="authors-number">
    <xsl:call-template name="get-authors-section-number"/>
  </xsl:variable>

  <xsl:if test="$authors-number!='suppress'">
    <li>
      <xsl:call-template name="insert-toc-line">
        <xsl:with-param name="target" select="concat($anchor-prefix,'.authors')"/>
        <xsl:with-param name="title" select="$authors-title"/>
        <xsl:with-param name="number" select="$authors-number"/>
      </xsl:call-template>
    </li>
  </xsl:if>

</xsl:template>

<xsl:template name="references-toc">

  <!-- distinguish two cases: (a) single references element (process
  as toplevel section; (b) multiple references sections (add one toplevel
  container with subsection) -->

  <xsl:variable name="refsecs" select="/rfc/back/references|/rfc/back/ed:replace/ed:ins/references"/>
   
  <xsl:choose>
    <xsl:when test="count($refsecs) = 0">
      <!-- nop -->
    </xsl:when>
    <xsl:when test="count($refsecs) = 1">
      <xsl:for-each select="$refsecs">
        <xsl:variable name="title">
          <xsl:choose>
            <xsl:when test="@title!=''"><xsl:value-of select="@title" /></xsl:when>
            <xsl:otherwise><xsl:value-of select="$xml2rfc-refparent"/></xsl:otherwise>
          </xsl:choose>
        </xsl:variable>
      
        <li>
          <xsl:call-template name="insert-toc-line">
            <xsl:with-param name="number">
              <xsl:call-template name="get-references-section-number"/>
            </xsl:with-param>
            <xsl:with-param name="target" select="concat($anchor-prefix,'.references')"/>
            <xsl:with-param name="title" select="$title"/>
          </xsl:call-template>
        </li>
      </xsl:for-each>
    </xsl:when>
    <xsl:otherwise>
      <li>
        <!-- insert pseudo container -->    
        <xsl:call-template name="insert-toc-line">
          <xsl:with-param name="number">
            <xsl:call-template name="get-references-section-number"/>
          </xsl:with-param>
          <xsl:with-param name="target" select="concat($anchor-prefix,'.references')"/>
          <xsl:with-param name="title" select="$xml2rfc-refparent"/>
        </xsl:call-template>
  
        <ul class="toc">
          <!-- ...with subsections... -->    
          <xsl:for-each select="$refsecs">
            <xsl:variable name="title">
              <xsl:choose>
                <xsl:when test="@title!=''"><xsl:value-of select="@title" /></xsl:when>
                <xsl:otherwise><xsl:value-of select="$xml2rfc-refparent"/></xsl:otherwise>
              </xsl:choose>
            </xsl:variable>
          
            <xsl:variable name="sectionNumber">
              <xsl:call-template name="get-section-number" />
            </xsl:variable>
    
            <xsl:variable name="num">
              <xsl:number level="any"/>
            </xsl:variable>
    
            <li>
              <xsl:call-template name="insert-toc-line">
                <xsl:with-param name="number" select="$sectionNumber"/>
                <xsl:with-param name="target" select="concat($anchor-prefix,'.references','.',$num)"/>
                <xsl:with-param name="title" select="$title"/>
              </xsl:call-template>
            </li>
          </xsl:for-each>
        </ul>
      </li>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="section|appendix" mode="toc">
  <xsl:variable name="sectionNumber">
    <xsl:call-template name="get-section-number" />
  </xsl:variable>

  <xsl:variable name="target">
    <xsl:choose>
      <xsl:when test="@anchor"><xsl:value-of select="@anchor" /></xsl:when>
       <xsl:otherwise><xsl:value-of select="$anchor-prefix"/>.section.<xsl:value-of select="$sectionNumber" /></xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <!-- obtain content, just to check whether we need to recurse at all -->
  <xsl:variable name="content">
    <li>
      <xsl:call-template name="insert-toc-line">
        <xsl:with-param name="number" select="$sectionNumber"/>
        <xsl:with-param name="target" select="$target"/>
        <xsl:with-param name="title" select="@title"/>
        <xsl:with-param name="tocparam" select="@toc"/>
        <xsl:with-param name="oldtitle" select="@ed:old-title"/>
        <xsl:with-param name="waschanged" select="@ed:resolves"/>
      </xsl:call-template>
    
      <ul class="toc">
        <xsl:apply-templates mode="toc" />
      </ul>
    </li>
  </xsl:variable>
  
  <xsl:if test="$content!=''">
    <li>
      <xsl:call-template name="insert-toc-line">
        <xsl:with-param name="number" select="$sectionNumber"/>
        <xsl:with-param name="target" select="$target"/>
        <xsl:with-param name="title" select="@title"/>
        <xsl:with-param name="tocparam" select="@toc"/>
        <xsl:with-param name="oldtitle" select="@ed:old-title"/>
        <xsl:with-param name="waschanged" select="@ed:resolves"/>
      </xsl:call-template>
    
      <!-- obtain nested content, just to check whether we need to recurse at all -->
      <xsl:variable name="nested-content">
        <ul class="toc">
          <xsl:apply-templates mode="toc" />
        </ul>
      </xsl:variable>
      
      <!-- only recurse if we need to (do not produce useless list container) -->      
      <xsl:if test="$nested-content!=''">
        <ul class="toc">
          <xsl:apply-templates mode="toc" />
        </ul>
      </xsl:if>
    </li>
  </xsl:if>
</xsl:template>

<xsl:template match="middle" mode="toc">
  <xsl:apply-templates mode="toc" />
  <xsl:call-template name="references-toc" />
</xsl:template>

<xsl:template match="rfc" mode="toc">
  <xsl:apply-templates select="middle" mode="toc" />
  <xsl:call-template name="back-toc" />
</xsl:template>

<xsl:template match="ed:del|ed:ins|ed:replace" mode="toc">
  <xsl:apply-templates mode="toc" />
</xsl:template>

<xsl:template match="*|text()" mode="toc" />


<xsl:template name="insertTocAppendix">
  
  <xsl:if test="//figure[@title!='' or @anchor!='']">
    <ul class="toc">
      <xsl:for-each select="//figure[@title!='' or @anchor!='']">
        <xsl:variable name="title">Figure <xsl:value-of select="position()"/><xsl:if test="@title">: <xsl:value-of select="@title"/></xsl:if>
        </xsl:variable>
        <li>
          <xsl:call-template name="insert-toc-line">
            <xsl:with-param name="target" select="concat($anchor-prefix,'.figure.',position())" />
            <xsl:with-param name="title" select="$title" />
          </xsl:call-template>
        </li>
      </xsl:for-each>
    </ul>
  </xsl:if>
  
  <!-- experimental -->
  <xsl:if test="//ed:issue">
    <xsl:call-template name="insertIssuesList" />
  </xsl:if>

</xsl:template>

<xsl:template name="referencename">
  <xsl:param name="node" />
  
  <xsl:for-each select="$node">
    <xsl:choose>
      <xsl:when test="$xml2rfc-symrefs!='no' and ancestor::ed:del">
        <xsl:variable name="unprefixed" select="substring-after(@anchor,'deleted-')"/>
        <xsl:choose>
          <xsl:when test="$unprefixed!=''">
            <xsl:value-of select="concat('[',$unprefixed,']')"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:if test="count(//reference[@anchor=current()/@anchor])!=1">
              <xsl:message>Deleted duplicate anchors should have the prefix "deleted-": <xsl:value-of select="@anchor"/></xsl:message>
            </xsl:if>
            <xsl:value-of select="concat('[',@anchor,']')"/>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:when>
      <xsl:when test="$xml2rfc-symrefs!='no'">[<xsl:value-of select="@anchor" />]</xsl:when>
      <xsl:when test="ancestor::ed:del">
        <xsl:text>[del]</xsl:text>
      </xsl:when>
      <xsl:otherwise>[<xsl:number level="any" count="reference[not(ancestor::ed:del)]"/>]</xsl:otherwise>
    </xsl:choose>
  </xsl:for-each>  
</xsl:template>



<xsl:template name="replace-substring">

  <xsl:param name="string" />
  <xsl:param name="replace" />
  <xsl:param name="by" />

  <xsl:choose>
    <xsl:when test="contains($string,$replace)">
      <xsl:value-of select="concat(substring-before($string, $replace),$by)" />
      <xsl:call-template name="replace-substring">
        <xsl:with-param name="string" select="substring-after($string,$replace)" />
        <xsl:with-param name="replace" select="$replace" />
        <xsl:with-param name="by" select="$by" />
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise><xsl:value-of select="$string" /></xsl:otherwise>
  </xsl:choose>

</xsl:template>

<xsl:template name="rfc-or-id-link">
  <xsl:param name="name" />
  
  <xsl:choose>
    <xsl:when test="starts-with($name,'draft-')">
      <a href="{concat($internetDraftUrlPrefix,$name,$internetDraftUrlPostfix)}"><xsl:value-of select="$name"/></a>
      <xsl:call-template name="check-front-matter-ref">
        <xsl:with-param name="name" select="$name"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="number($name)=$name">
      <a href="{concat($rfcUrlPrefix,$name,$rfcUrlPostfix)}"><xsl:value-of select="$name"/></a>
      <xsl:call-template name="check-front-matter-ref">
        <xsl:with-param name="name" select="$name"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$name"/>
      <xsl:call-template name="warning">
        <xsl:with-param name="inline" select="'no'"/>
        <xsl:with-param name="msg" select="concat('In metadata obsoletes/updates, RFC number of draft name is expected - found: ',$name)"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="rfclist">
  <xsl:param name="list" />
  <xsl:choose>
    <xsl:when test="contains($list,',')">
      <xsl:variable name="rfcNo" select="substring-before($list,',')" />
      <xsl:call-template name="rfc-or-id-link">
        <xsl:with-param name="name" select="$rfcNo"/>
      </xsl:call-template>
      <xsl:text>, </xsl:text>
      <xsl:call-template name="rfclist">
        <xsl:with-param name="list" select="normalize-space(substring-after($list,','))" />
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="rfcNo" select="$list" />
      <xsl:call-template name="rfc-or-id-link">
        <xsl:with-param name="name" select="$rfcNo"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="check-front-matter-ref">
  <xsl:param name="name"/>
  <xsl:choose>
    <xsl:when test="starts-with($name,'draft-')">
      <xsl:if test="not(//references//reference/seriesInfo[@name='Internet-Draft' and @value=$name])">
        <xsl:call-template name="warning">
          <xsl:with-param name="inline" select="'no'"/>
          <xsl:with-param name="msg" select="concat('front matter mentions I-D ',$name,' for which there is no reference element')"/>
        </xsl:call-template>
      </xsl:if>
    </xsl:when>
    <xsl:otherwise>
      <xsl:if test="not(//references//reference/seriesInfo[@name='RFC' and @value=$name])">
        <xsl:call-template name="warning">
          <xsl:with-param name="inline" select="'no'"/>
          <xsl:with-param name="msg" select="concat('front matter mentions RFC ',$name,' for which there is no reference element')"/>
        </xsl:call-template>
      </xsl:if>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="check-anchor">
  <xsl:if test="@anchor and @anchor!=''">
    <!-- check validity of anchor name -->
    <xsl:variable name="test">
      <xsl:element name="{@anchor}"/>
    </xsl:variable>
    <xsl:if test="count(exslt:node-set($test)//*) = 0">
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('&quot;',@anchor,'&quot; is not a valid XML name')"/>
      </xsl:call-template>
    </xsl:if>
  </xsl:if>
</xsl:template>

<xsl:template name="copy-anchor">
  <xsl:call-template name="check-anchor"/>
  <xsl:if test="@anchor and @anchor!=''">
    <xsl:attribute name="id"><xsl:value-of select="@anchor"/></xsl:attribute>
  </xsl:if>
</xsl:template>

<xsl:template name="rfclist-for-dcmeta">
  <xsl:param name="list" />
  <xsl:choose>
    <xsl:when test="contains($list,',')">
      <xsl:variable name="rfcNo" select="substring-before($list,',')" />
      <meta name="dct.replaces" content="urn:ietf:rfc:{$rfcNo}" />
      <xsl:call-template name="rfclist-for-dcmeta">
        <xsl:with-param name="list" select="normalize-space(substring-after($list,','))" />
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="rfcNo" select="$list" />
      <meta name="dct.replaces" content="urn:ietf:rfc:{$rfcNo}" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-paragraph-number">
  <!-- get section number of ancestor section element, then add t or figure number -->
  <xsl:if test="ancestor::section and not(ancestor::section[@myns:unnumbered='unnumbered']) and not(ancestor::x:blockquote) and not(ancestor::x:note)">
    <xsl:for-each select="ancestor::section[1]"><xsl:call-template name="get-section-number" />.p.</xsl:for-each><xsl:number count="t|figure|x:blockquote|x:note" />
  </xsl:if>
</xsl:template>

<xsl:template name="editingMark">
  <xsl:if test="$xml2rfc-editing='yes' and ancestor::rfc">
    <sup class="editingmark"><span><xsl:number level="any" count="postamble|preamble|t"/></span>&#0160;</sup>
  </xsl:if>
</xsl:template>

<!-- internal ref support -->
<xsl:key name="anchor-item-alias" match="//*[@anchor and (x:anchor-alias/@value or ed:replace/ed:ins/x:anchor-alias)]" use="x:anchor-alias/@value | ed:replace/ed:ins/x:anchor-alias/@value"/>

<xsl:template match="x:ref">
  <xsl:variable name="val" select="."/>
<!--  <xsl:variable name="target" select="//*[(@anchor and x:anchor-alias/@value=$val) or (@anchor and ed:replace/ed:ins/x:anchor-alias/@value=$val) or (@anchor=$val)]"/> -->
  <xsl:variable name="target" select="key('anchor-item',$val) | key('anchor-item-alias',$val)"/>
  <xsl:variable name="irefs" select="//iref[@x:for-anchor=$val]"/>
  <xsl:choose>
    <xsl:when test="$target">
      <a href="#{$target/@anchor}" class="smpl">
        <xsl:call-template name="copy-anchor"/>
        <!-- to be indexed? -->
        <xsl:if test="$irefs">
          <xsl:attribute name="id"><xsl:call-template name="compute-extref-anchor"/></xsl:attribute>
        </xsl:if>
        <xsl:value-of select="."/>
      </a>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="warning">
        <xsl:with-param name="inline" select="'no'"/>
        <xsl:with-param name="msg">internal link target for '<xsl:value-of select="."/>' does not exist.</xsl:with-param>
      </xsl:call-template>
      <xsl:value-of select="."/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- Nothing to do here -->
<xsl:template match="x:anchor-alias" />

<!-- Quotes -->
<xsl:template match="x:q">
  <q>
    <xsl:copy-of select="@cite"/>
    <xsl:apply-templates/>
  </q>
</xsl:template>

<!-- Notes -->
<xsl:template match="x:note">
  <xsl:variable name="p">
    <xsl:call-template name="get-paragraph-number" />
  </xsl:variable>

  <div class="note">
    <xsl:if test="$p!='' and not(ancestor::ed:del) and not(ancestor::ed:ins)">
      <xsl:attribute name="id"><xsl:value-of select="$anchor-prefix"/>.section.<xsl:value-of select="$p"/></xsl:attribute>
    </xsl:if>
    <xsl:apply-templates/>
  </div>
</xsl:template>

<xsl:template match="x:bcp14">
  <!-- check valid BCP14 keywords, then emphasize them -->
  <xsl:variable name="c" select="normalize-space(.)"/>
  <xsl:choose>
    <xsl:when test="$c='MUST' or $c='REQUIRED' or $c='SHALL'">
      <em class="bcp14"><xsl:value-of select="."/></em>
    </xsl:when>
    <xsl:when test="$c='MUST NOT' or $c='SHALL NOT'">
      <em class="bcp14"><xsl:value-of select="."/></em>
    </xsl:when>
    <xsl:when test="$c='SHOULD' or $c='RECOMMENDED'">
      <em class="bcp14"><xsl:value-of select="."/></em>
    </xsl:when>
    <xsl:when test="$c='SHOULD NOT' or $c='NOT RECOMMENDED'">
      <em class="bcp14"><xsl:value-of select="."/></em>
    </xsl:when>
    <xsl:when test="$c='MAY' or $c='OPTIONAL'">
      <em class="bcp14"><xsl:value-of select="."/></em>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="."/>
      <xsl:message>ERROR: unknown BCP14 keyword: <xsl:value-of select="."/></xsl:message>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="x:blockquote">
  <xsl:variable name="p">
    <xsl:call-template name="get-paragraph-number" />
  </xsl:variable>

  <blockquote>
    <xsl:if test="string-length($p) &gt; 0 and not(ancestor::ed:del) and not(ancestor::ed:ins)">
      <xsl:attribute name="id"><xsl:value-of select="$anchor-prefix"/>.section.<xsl:value-of select="$p"/></xsl:attribute>
    </xsl:if>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:call-template name="editingMark" />
    <xsl:copy-of select="@cite"/>
    <xsl:apply-templates/>
  </blockquote>
</xsl:template>

<!-- Definitions -->
<xsl:template match="x:dfn">
  <dfn>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates/>
  </dfn>
</xsl:template>

<!-- headings -->
<xsl:template match="x:h">
  <b>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates/>
  </b>
</xsl:template>

<!-- superscripts -->
<xsl:template match="x:sup">
  <sup>
    <xsl:apply-templates/>
  </sup>
</xsl:template>

<!-- bold -->
<xsl:template match="x:highlight">
  <b>
    <xsl:call-template name="copy-anchor"/>
    <xsl:apply-templates/>
  </b>
</xsl:template>

<!-- measuring lengths -->
<xsl:template match="x:length-of">
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        </a>
        <xsl:if test="$count &lt; $total">
          <a class="bg-issue" title="next change for {$resolves}" href="#{$anchor-prefix}.change.{$resolves}.{$count + 1}">&#x2193;</a>
        </xsl:if>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:for-each>
</xsl:template>

<xsl:template match="ed:replace">
  <!-- we need to special-case things like lists and tables -->
  <xsl:choose>
    <xsl:when test="parent::list">
      <xsl:apply-templates select="ed:del/node()" />
      <xsl:apply-templates select="ed:ins/node()" />
    </xsl:when>
    <xsl:when test="parent::references">
      <xsl:apply-templates select="ed:del/node()" />
      <xsl:apply-templates select="ed:ins/node()" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:if test="@cite">
        <a class="editor-issue" href="{@cite}" target="_blank" title="see {@cite}">
          <xsl:text>&#160;i&#160;</xsl:text>
        </a>
      </xsl:if>
      <xsl:call-template name="insert-issue-pointer"/>
      <xsl:if test="ed:del">
        <del>
          <xsl:copy-of select="@*[namespace-uri()='']"/>
          <xsl:if test="not(@title) and ancestor-or-self::xsl:template[@ed:entered-by] and @datetime">
            <xsl:attribute name="title"><xsl:value-of select="concat(@datetime,', ',ancestor-or-self::*[@ed:entered-by][1]/@ed:entered-by)"/></xsl:attribute>
          </xsl:if>
          <xsl:apply-templates select="ed:del/node()" />
        </del>
      </xsl:if>
      <xsl:if test="ed:ins">
        <ins>
          <xsl:copy-of select="@*[namespace-uri()='']"/>
          <xsl:if test="not(@title) and ancestor-or-self::*[@ed:entered-by] and @datetime">
            <xsl:attribute name="title"><xsl:value-of select="concat(@datetime,', ',ancestor-or-self::*[@ed:entered-by][1]/@ed:entered-by)"/></xsl:attribute>
          </xsl:if>
          <xsl:apply-templates select="ed:ins/node()" />
        </ins>
      </xsl:if>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- convenience template for helping Mozilla (pre/ins inheritance problem) -->
<xsl:template name="insertInsDelClass">
  <xsl:if test="ancestor::ed:del">
    <xsl:attribute name="class">del</xsl:attribute>
  </xsl:if>
  <xsl:if test="ancestor::ed:ins">
    <xsl:attribute name="class">ins</xsl:attribute>
  </xsl:if>
</xsl:template>


<xsl:template name="sectionnumberAndEdits">
  <xsl:choose>
    <xsl:when test="ancestor::ed:del">
      <xsl:text>del-</xsl:text>
      <xsl:number count="ed:del//section" level="any"/>
    </xsl:when>
    <xsl:when test="@x:fixed-section-number and @x:fixed-section-number!=''">
      <xsl:value-of select="@x:fixed-section-number"/>
    </xsl:when>
    <xsl:when test="@x:fixed-section-number and @x:fixed-section-number=''">
      <xsl:text>unnumbered-</xsl:text>
      <xsl:number count="section[@x:fixed-section-number='']" level="any"/>
    </xsl:when>
    <xsl:when test="self::section and parent::ed:ins and local-name(../..)='replace'">
      <xsl:for-each select="../.."><xsl:call-template name="sectionnumberAndEdits" /></xsl:for-each>
      <xsl:for-each select="..">
        <xsl:if test="parent::ed:replace">
          <xsl:for-each select="..">
            <xsl:if test="parent::section">.</xsl:if>
            <xsl:variable name="cnt" select="1+count(preceding-sibling::section|preceding-sibling::ed:ins/section|preceding-sibling::ed:replace/ed:ins/section)" />
            <xsl:choose>
              <xsl:when test="ancestor::back and not(ancestor::section)"><xsl:number format="A" value="$cnt"/></xsl:when>
              <xsl:otherwise><xsl:value-of select="$cnt"/></xsl:otherwise>
            </xsl:choose>
          </xsl:for-each>
        </xsl:if>
      </xsl:for-each>
    </xsl:when>
    <xsl:when test="self::section[parent::ed:ins]">
      <xsl:for-each select="../.."><xsl:call-template name="sectionnumberAndEdits" /></xsl:for-each>
      <xsl:for-each select="..">
        <xsl:if test="parent::section">.</xsl:if><xsl:value-of select="1+count(preceding-sibling::section|preceding-sibling::ed:ins/section|preceding-sibling::ed:replace/ed:ins/section)" />
      </xsl:for-each>
    </xsl:when>
    <xsl:when test="self::section">
      <xsl:for-each select=".."><xsl:call-template name="sectionnumberAndEdits" /></xsl:for-each>
      <xsl:if test="parent::section">.</xsl:if>
      <xsl:choose>
        <xsl:when test="parent::back">
          <xsl:number format="A" value="1+count(preceding-sibling::section|preceding-sibling::ed:ins/section|preceding-sibling::ed:replace/ed:ins/section)" />
        </xsl:when>
        <xsl:otherwise>
          <xsl:number value="1+count(preceding-sibling::section|preceding-sibling::ed:ins/section|preceding-sibling::ed:replace/ed:ins/section)" />
        </xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <xsl:when test="self::references">
      <xsl:choose>
        <xsl:when test="count(/*/back/references)+count(/*/back/ed:replace/ed:ins/references)=1"><xsl:call-template name="get-references-section-number"/></xsl:when>
        <xsl:otherwise><xsl:call-template name="get-references-section-number"/>.<xsl:number level="any"/></xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <xsl:when test="self::middle or self::back"><!-- done --></xsl:when>
    <xsl:otherwise>
      <!-- go up one level -->
      <xsl:for-each select=".."><xsl:call-template name="sectionnumberAndEdits" /></xsl:for-each>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- utilities for warnings -->

<xsl:template name="trace">
  <xsl:param name="msg"/>
  <xsl:param name="msg2"/>
  <xsl:param name="inline"/>
  <xsl:call-template name="emit-message">
    <xsl:with-param name="level">TRACE</xsl:with-param>
    <xsl:with-param name="msg" select="$msg"/>
    <xsl:with-param name="msg2" select="$msg2"/>
    <xsl:with-param name="inline" select="$inline"/>
  </xsl:call-template>
</xsl:template>

<xsl:template name="warning">
  <xsl:param name="msg"/>
  <xsl:param name="msg2"/>
  <xsl:param name="inline"/>
  <xsl:call-template name="emit-message">
    <xsl:with-param name="level">WARNING</xsl:with-param>
    <xsl:with-param name="msg" select="$msg"/>
    <xsl:with-param name="msg2" select="$msg2"/>
    <xsl:with-param name="inline" select="$inline"/>
  </xsl:call-template>
</xsl:template>

<xsl:template name="info">
  <xsl:param name="msg"/>
  <xsl:param name="msg2"/>
  <xsl:param name="inline"/>
  <xsl:call-template name="emit-message">
    <xsl:with-param name="level">INFO</xsl:with-param>
    <xsl:with-param name="msg" select="$msg"/>
    <xsl:with-param name="msg2" select="$msg2"/>
    <xsl:with-param name="inline" select="$inline"/>
  </xsl:call-template>
</xsl:template>

<xsl:template name="error">
  <xsl:param name="msg"/>
  <xsl:param name="msg2"/>
  <xsl:param name="inline"/>
  <xsl:call-template name="emit-message">
    <xsl:with-param name="level">ERROR</xsl:with-param>
    <xsl:with-param name="msg" select="$msg"/>
    <xsl:with-param name="msg2" select="$msg2"/>
    <xsl:with-param name="inline" select="$inline"/>
  </xsl:call-template>
</xsl:template>

<xsl:template name="emit-message">
  <xsl:param name="level"/>
  <xsl:param name="msg"/>
  <xsl:param name="msg2"/>
  <xsl:param name="inline"/>
  <xsl:variable name="message"><xsl:value-of select="$level"/>: <xsl:value-of select="$msg"/><xsl:value-of select="$msg2"/><xsl:call-template name="lineno"/></xsl:variable>
  <xsl:choose>
    <xsl:when test="$inline!='no'">
      <div class="error"><xsl:value-of select="$message"/></div>
    </xsl:when>
    <xsl:otherwise>
      <!-- this fails when the message contains characters not encodable in the output encoding -->
      <!-- <xsl:comment><xsl:value-of select="$message"/></xsl:comment> -->
    </xsl:otherwise>
  </xsl:choose>
  <xsl:message><xsl:value-of select="$message"/></xsl:message>
</xsl:template>

<!-- table formatting -->

<xsl:template match="texttable">

  <xsl:variable name="anch">
    <xsl:call-template name="get-table-anchor"/>
  </xsl:variable>

  <div id="{$anch}">

    <xsl:if test="@anchor!=''">
      <div id="{@anchor}"/>
    </xsl:if>
    <xsl:apply-templates select="preamble" />
    <xsl:variable name="style">
      <xsl:text>tt </xsl:text>
      <xsl:choose>
        <xsl:when test="@style!=''">
          <xsl:value-of select="@style"/>
        </xsl:when>
        <xsl:otherwise>full</xsl:otherwise>
      </xsl:choose>
      <xsl:choose>
        <xsl:when test="@align='left'"> left</xsl:when>
        <xsl:when test="@align='right'"> right</xsl:when>
        <xsl:when test="@align='center' or not(@align) or @align=''"> center</xsl:when>
        <xsl:otherwise/>
      </xsl:choose>

    </xsl:variable>

    <table class="{$style}" cellpadding="3" cellspacing="0">
      <xsl:if test="(@title!='' or @anchor!='') and not(@suppress-title='true')">
        <xsl:variable name="n"><xsl:number level="any" count="texttable[(@title!='' or @anchor!='') and not(@suppress-title='true')]" /></xsl:variable>
        <caption>Table <xsl:value-of select="$n"/><xsl:if test="@title!=''">: <xsl:value-of select="@title" /></xsl:if></caption>
      </xsl:if>

      <xsl:if test="ttcol!=''">
        <!-- skip header when all column titles are empty -->
        <thead>
          <tr>
            <xsl:apply-templates select="ttcol" />
          </tr>
        </thead>
      </xsl:if>
      <tbody>
        <xsl:variable name="columns" select="count(ttcol)" />
        <xsl:variable name="fields" select="c | ed:replace/ed:ins/c | ed:replace/ed:del/c" />
        <xsl:for-each select="$fields[$columns=1 or (position() mod $columns) = 1]">
          <tr>
            <xsl:for-each select=". | following-sibling::c[position() &lt; $columns]">
              <td>
                <xsl:call-template name="insertInsDelClass"/>
                <xsl:variable name="pos" select="position()" />
                <xsl:variable name="col" select="../ttcol[position() = $pos]" />
                <xsl:choose>
                  <xsl:when test="$col/@align='right' or $col/@align='center'">
                    <xsl:attribute name="class"><xsl:value-of select="$col/@align"/></xsl:attribute>
                  </xsl:when>
                  <xsl:when test="$col/@align='left' or not($col/@align)">
                    <xsl:attribute name="class">left</xsl:attribute>
                  </xsl:when>
                  <xsl:otherwise>
                    <xsl:call-template name="warning">
                      <xsl:with-param name="inline" select="'no'"/>
                      <xsl:with-param name="msg">Unknown align attribute on ttcol: <xsl:value-of select="$col/@align"/></xsl:with-param>                      
                    </xsl:call-template>
                  </xsl:otherwise>
                </xsl:choose>
                <xsl:apply-templates select="node()" />
              </td>
            </xsl:for-each>
          </tr>
        </xsl:for-each>
      </tbody>
    </table>
    <xsl:apply-templates select="postamble" />
  </div>
  
</xsl:template>

<xsl:template match="ttcol">
  <th>
    
    <xsl:choose>
      <xsl:when test="@align='right' or @align='center' or @align='left'">
        <xsl:attribute name="class"><xsl:value-of select="@align"/></xsl:attribute>
      </xsl:when>
      <xsl:when test="not(@align)">
        <!-- that's the default, nothing to do here -->
      </xsl:when>
      <xsl:otherwise>
        <xsl:message>Unknown align attribute on ttcol: <xsl:value-of select="@align"/></xsl:message>
      </xsl:otherwise>
    </xsl:choose>
    
    <xsl:if test="@width">
      <xsl:attribute name="style">width: <xsl:value-of select="@width" />;</xsl:attribute>
    </xsl:if>

    <xsl:apply-templates />
  </th>
</xsl:template>

<!-- cref support -->

<xsl:template name="get-comment-name">
  <xsl:choose>
    <xsl:when test="@anchor">
      <xsl:value-of select="@anchor"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$anchor-prefix"/>
      <xsl:text>.comment.</xsl:text>
      <xsl:number count="cref[not(@anchor)]" level="any"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match="cref">
  <xsl:if test="$xml2rfc-comments!='no'">
    <xsl:variable name="cid">
      <xsl:call-template name="get-comment-name"/>
    </xsl:variable>
    
    <span class="comment">
      <xsl:choose>
        <xsl:when test="$xml2rfc-inline='yes'">
          <xsl:attribute name="id">
            <xsl:value-of select="$cid"/>
          </xsl:attribute>
          <xsl:text>[</xsl:text>
          <a href="#{$cid}" class="smpl">
            <xsl:value-of select="$cid"/>
          </a>
          <xsl:text>: </xsl:text>
          <xsl:apply-templates select="text()|eref|xref"/>
          <xsl:if test="@source"> --<xsl:value-of select="@source"/></xsl:if>
          <xsl:text>]</xsl:text>
        </xsl:when>
        <xsl:otherwise>
          <xsl:attribute name="title">
            <xsl:if test="@source"><xsl:value-of select="@source"/>: </xsl:if>
            <xsl:apply-templates select="text()|eref|xref"/>
          </xsl:attribute>
          <xsl:text>[</xsl:text>
          <a href="#{$cid}">
            <xsl:value-of select="$cid"/>
          </a>
          <xsl:text>]</xsl:text>
        </xsl:otherwise>
      </xsl:choose>
    </span>
  </xsl:if>
</xsl:template>

<xsl:template name="insertComments">

  <xsl:call-template name="insert-conditional-hrule"/>
    
  <h1>
    <xsl:call-template name="insert-conditional-pagebreak"/>
    <a id="{$anchor-prefix}.comments" href="#{$anchor-prefix}.comments">Editorial Comments</a>
  </h1>

  <dl>
    <xsl:for-each select="//cref">
      <xsl:variable name="cid">
        <xsl:choose>
          <xsl:when test="@anchor">
            <xsl:value-of select="@anchor"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:value-of select="$anchor-prefix"/>
            <xsl:text>.comment.</xsl:text>
            <xsl:number count="cref[not(@anchor)]" level="any"/>
          </xsl:otherwise>
        </xsl:choose>
      </xsl:variable>
      <dt id="{$cid}">
        [<xsl:value-of select="$cid"/>]
      </dt>
      <dd>
        <xsl:apply-templates select="node()"/>
        <xsl:if test="@source"> --<xsl:value-of select="@source"/></xsl:if>
      </dd>
    </xsl:for-each>
  </dl>
</xsl:template>


<!-- Chapter Link Generation -->

<xsl:template match="*" mode="links"><xsl:apply-templates mode="links"/></xsl:template>
<xsl:template match="text()" mode="links" />

<xsl:template match="/*/middle//section[not(myns:unnumbered) and not(ancestor::section)]" mode="links">
  <xsl:variable name="sectionNumber"><xsl:call-template name="get-section-number" /></xsl:variable>
  <xsl:variable name="title">
    <xsl:if test="$sectionNumber!='' and not(contains($sectionNumber,'unnumbered-'))">
      <xsl:value-of select="$sectionNumber"/>
      <xsl:text> </xsl:text>
    </xsl:if>
    <xsl:value-of select="@title"/>
  </xsl:variable>
  <link rel="Chapter" title="{$title}" href="#{$anchor-prefix}.section.{$sectionNumber}"/>
  <xsl:apply-templates mode="links" />
</xsl:template>

<xsl:template match="/*/back//section[not(myns:unnumbered) and not(ancestor::section)]" mode="links">
  <xsl:variable name="sectionNumber"><xsl:call-template name="get-section-number" /></xsl:variable>
  <xsl:variable name="title">
    <xsl:if test="$sectionNumber!='' and not(contains($sectionNumber,'unnumbered-'))">
      <xsl:value-of select="$sectionNumber"/>
      <xsl:text> </xsl:text>
    </xsl:if>
    <xsl:value-of select="@title"/>
  </xsl:variable>
  <link rel="Appendix" title="{$title}" href="#{$anchor-prefix}.section.{$sectionNumber}"/>
  <xsl:apply-templates mode="links" />
</xsl:template>

<xsl:template match="/*/back/references[position()=1]" mode="links">
  <xsl:variable name="sectionNumber"><xsl:call-template name="get-references-section-number" /></xsl:variable>
  <link rel="Chapter" href="#{$anchor-prefix}.section.{$sectionNumber}">
    <xsl:choose>
      <xsl:when test="@title and count(/*/back/references)=1">
        <xsl:attribute name="title">
          <xsl:call-template name="get-references-section-number"/>
          <xsl:text> </xsl:text>
          <xsl:value-of select="@title"/>
        </xsl:attribute>
      </xsl:when>
      <xsl:otherwise>
        <xsl:attribute name="title">
          <xsl:call-template name="get-references-section-number"/>
          <xsl:text> </xsl:text>
          <xsl:value-of select="$xml2rfc-refparent"/>
        </xsl:attribute>
      </xsl:otherwise>
    </xsl:choose>
  </link>
</xsl:template>

<!-- convenience templates -->

<xsl:template name="get-author-summary">
  <xsl:choose>
    <xsl:when test="count(/rfc/front/author)=1">
      <xsl:value-of select="/rfc/front/author[1]/@surname" />
    </xsl:when>
    <xsl:when test="count(/rfc/front/author)=2">
      <xsl:value-of select="concat(/rfc/front/author[1]/@surname,' &amp; ',/rfc/front/author[2]/@surname)" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="concat(/rfc/front/author[1]/@surname,', et al.')" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-category-long">
  <xsl:choose>
    <xsl:when test="$xml2rfc-footer!=''"><xsl:value-of select="$xml2rfc-footer" /></xsl:when>
    <xsl:when test="$xml2rfc-private!=''"/> <!-- private draft, footer not set -->
    <xsl:when test="/rfc/@category='bcp'">Best Current Practice</xsl:when>
    <xsl:when test="/rfc/@category='historic'">Historic</xsl:when>
    <xsl:when test="/rfc/@category='info' or not(/rfc/@category)">Informational</xsl:when>
    <xsl:when test="/rfc/@category='std'">Standards Track</xsl:when>
    <xsl:when test="/rfc/@category='exp'">Experimental</xsl:when>
    <xsl:otherwise>(category unknown)</xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-header-center">
  <xsl:choose>
    <xsl:when test="string-length(/rfc/front/title/@abbrev) &gt; 0">
      <xsl:value-of select="/rfc/front/title/@abbrev" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:apply-templates select="/rfc/front/title" mode="get-text-content" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-header-left">
  <xsl:choose>
    <xsl:when test="$xml2rfc-header!=''"><xsl:value-of select="$xml2rfc-header" /></xsl:when>
    <xsl:when test="$xml2rfc-private!=''"/> <!-- private draft, header not set -->
    <xsl:when test="/rfc/@ipr and not(/rfc/@number)">Internet-Draft</xsl:when>
    <xsl:otherwise>RFC <xsl:value-of select="/rfc/@number"/></xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-generator">
  <xsl:variable name="gen">
    <xsl:text>http://greenbytes.de/tech/webdav/rfc2629.xslt, </xsl:text>
    <!-- when RCS keyword substitution in place, add version info -->
    <xsl:if test="contains('$Revision: 1.514 $',':')">
      <xsl:value-of select="concat('Revision ',normalize-space(translate(substring-after('$Revision: 1.514 $', 'Revision: '),'$','')),', ')" />
    </xsl:if>
    <xsl:if test="contains('$Date: 2010-03-11 14:52:05 $',':')">
      <xsl:value-of select="concat(normalize-space(translate(substring-after('$Date: 2010-03-11 14:52:05 $', 'Date: '),'$','')),', ')" />
    </xsl:if>
    <xsl:value-of select="concat('XSLT vendor: ',system-property('xsl:vendor'),' ',system-property('xsl:vendor-url'))" />
  </xsl:variable>
  <xsl:value-of select="$gen" />
</xsl:template>

<xsl:template name="get-header-right">
  <xsl:value-of select="concat($xml2rfc-ext-pub-month, ' ', $xml2rfc-ext-pub-year)" />
</xsl:template>

<xsl:template name="get-keywords">
  <xsl:for-each select="/rfc/front/keyword">
    <xsl:if test="contains(.,',')">
      <xsl:call-template name="warning">
        <xsl:with-param name="inline" select="'no'"/>
        <xsl:with-param name="msg">keyword element appears to contain a comma-separated list, split into multiple elements instead.</xsl:with-param>
      </xsl:call-template>
    </xsl:if>
    <xsl:value-of select="normalize-space(.)" />
    <xsl:if test="position()!=last()">, </xsl:if>
  </xsl:for-each>
</xsl:template>

<!-- get language from context node. nearest ancestor or return the default of "en" -->
<xsl:template name="get-lang">
  <xsl:choose>
    <xsl:when test="ancestor-or-self::*[@xml:lang]"><xsl:value-of select="ancestor-or-self::*/@xml:lang" /></xsl:when>
    <xsl:otherwise>en</xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-section-number">
  <xsl:variable name="anchor" select="@anchor"/>
  <xsl:choose>
    <xsl:when test="@x:fixed-section-number and @x:fixed-section-number!=''">
      <xsl:value-of select="@x:fixed-section-number"/>
    </xsl:when>
    <xsl:when test="@x:fixed-section-number and @x:fixed-section-number=''">
      <xsl:text>unnumbered-</xsl:text>
      <xsl:number count="section[@x:fixed-section-number='']" level="any"/>
    </xsl:when>
    <xsl:when test="$has-edits or ancestor::*/@x:fixed-section-number">
      <xsl:call-template name="sectionnumberAndEdits" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:choose>
        <xsl:when test="self::references">
          <xsl:choose>
            <xsl:when test="count(/*/back/references)=1">
              <xsl:call-template name="get-references-section-number"/>
            </xsl:when>
            <xsl:otherwise>
              <xsl:call-template name="get-references-section-number"/>.<xsl:number count="references"/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:when>
        <xsl:when test="self::reference">
          <xsl:for-each select="parent::references">
            <xsl:choose>
              <xsl:when test="count(/*/back/references)=1">
                <xsl:call-template name="get-references-section-number"/>
              </xsl:when>
              <xsl:otherwise>
                <xsl:call-template name="get-references-section-number"/>.<xsl:number count="references"/>
              </xsl:otherwise>
            </xsl:choose>
          </xsl:for-each>
        </xsl:when>
        <xsl:when test="ancestor::reference">
          <xsl:for-each select="ancestor::reference">
            <xsl:call-template name="get-section-number"/>
          </xsl:for-each>
        </xsl:when>
        <xsl:when test="ancestor::back"><xsl:number count="section|appendix" level="multiple" format="A.1.1.1.1.1.1.1" /></xsl:when>
        <xsl:when test="self::appendix"><xsl:number count="appendix" level="multiple" format="A.1.1.1.1.1.1.1" /></xsl:when>
        <xsl:otherwise><xsl:number count="section" level="multiple"/></xsl:otherwise>
      </xsl:choose>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- get the section number for the references section -->
<xsl:template name="get-references-section-number">
  <xsl:value-of select="count(/rfc/middle/section) + count(/rfc/middle/ed:replace/ed:ins/section) + 1"/>
</xsl:template>

<xsl:template name="emit-section-number">
  <xsl:param name="no"/>
  <xsl:value-of select="$no"/><xsl:if test="not(contains($no,'.')) or $xml2rfc-ext-sec-no-trailing-dots='yes'">.</xsl:if>
</xsl:template>

<xsl:template name="get-section-type">
  <xsl:param name="prec" /> <!-- TODO: check this, it's unused -->
  <xsl:choose>
    <xsl:when test="ancestor::back">Appendix</xsl:when>
    <xsl:otherwise>Section</xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-table-anchor">
  <xsl:value-of select="$anchor-prefix"/>
  <xsl:text>.table.</xsl:text>
  <xsl:choose>
    <xsl:when test="@title!='' or @anchor!=''">
      <xsl:number level="any" count="texttable[@title!='' or @anchor!='']" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:text>u.</xsl:text>
      <xsl:number level="any" count="texttable[not(@title!='' or @anchor!='')]" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="get-figure-anchor">
  <xsl:value-of select="$anchor-prefix"/>
  <xsl:text>.figure.</xsl:text>
  <xsl:choose>
    <xsl:when test="@title!='' or @anchor!=''">
      <xsl:number level="any" count="figure[@title!='' or @anchor!='']" />
    </xsl:when>
    <xsl:otherwise>
      <xsl:text>u.</xsl:text>
      <xsl:number level="any" count="figure[not(@title!='' or @anchor!='')]" />
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- reformat contents of author/@initials -->
<xsl:template name="format-initials">
  <xsl:choose>
    <xsl:when test="string-length(@initials)=1">
      <xsl:value-of select="concat(@initials,'.')"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="@initials"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template name="extract-normalized">
  <xsl:param name="node"/>
  <xsl:param name="name"/>
  <xsl:variable name="text" select="normalize-space($node)"/>
  <xsl:if test="string-length($node) != string-length($text)">
    <xsl:call-template name="warning">
      <xsl:with-param name="inline" select="'no'"/>
      <xsl:with-param name="msg">excessive whitespace in <xsl:value-of select="$name"/>: '<xsl:value-of select="$node"/>'</xsl:with-param>
    </xsl:call-template>
  </xsl:if>
  <xsl:value-of select="$text"/>
</xsl:template>

<!-- checking for email element -->
<xsl:template name="extract-email">
  <xsl:variable name="email" select="normalize-space(.)"/>
  <xsl:if test="string-length(.) != string-length($email) or contains($email,' ')">
    <xsl:call-template name="warning">
      <xsl:with-param name="inline" select="'no'"/>
      <xsl:with-param name="msg">excessive whitespace in email address: '<xsl:value-of select="."/>'</xsl:with-param>
    </xsl:call-template>
  </xsl:if>
  
  <xsl:variable name="email2">
    <xsl:choose>
      <xsl:when test="starts-with($email,'mailto:')">
        <xsl:call-template name="warning">
          <xsl:with-param name="inline" select="'no'"/>
          <xsl:with-param name="msg">email should not include URI scheme: '<xsl:value-of select="."/>'</xsl:with-param>
        </xsl:call-template>
        <xsl:value-of select="substring($email, 1 + string-length('mailto:'))"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="$email"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  
  <xsl:value-of select="$email2"/>
</xsl:template>

<!-- checking for uri element -->
<xsl:template name="extract-uri">
  <xsl:variable name="uri" select="normalize-space(.)"/>
  <xsl:if test="string-length(.) != string-length($uri) or contains($uri,' ')">
    <xsl:call-template name="warning">
      <xsl:with-param name="inline" select="'no'"/>
      <xsl:with-param name="msg">excessive whitespace in URI: '<xsl:value-of select="."/>'</xsl:with-param>
    </xsl:call-template>
  </xsl:if>
  
  <xsl:value-of select="$uri"/>
</xsl:template>

<xsl:template name="insert-conditional-pagebreak">
  <xsl:if test="$xml2rfc-compact!='yes'">
    <xsl:attribute name="class">np</xsl:attribute>
  </xsl:if>
</xsl:template>

<xsl:template name="insert-conditional-hrule">
  <xsl:if test="$xml2rfc-compact!='yes'">
    <hr class="noprint" />
  </xsl:if>
</xsl:template>

<!-- get text content from marked-up text -->

<xsl:template match="text()" mode="get-text-content">
  <xsl:value-of select="."/>
</xsl:template>

<xsl:template match="*" mode="get-text-content">
  <xsl:apply-templates mode="get-text-content"/>
</xsl:template>

<xsl:template match="ed:del" mode="get-text-content">
</xsl:template>

<!-- parsing of processing instructions -->
<xsl:template name="parse-pis">
  <xsl:param name="nodes"/>
  <xsl:param name="attr"/>
  <xsl:param name="sep"/>
  <xsl:param name="ret"/>
  <xsl:param name="default"/>
  
  <xsl:choose>
    <xsl:when test="count($nodes)=0">
      <xsl:choose>
        <xsl:when test="$ret!=''">
          <xsl:value-of select="$ret"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:value-of select="$default"/>
        </xsl:otherwise>    
      </xsl:choose>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="ret2">
        <xsl:for-each select="$nodes[1]">
          <xsl:call-template name="parse-one-pi">
            <xsl:with-param name="str" select="."/>
            <xsl:with-param name="attr" select="$attr"/>
            <xsl:with-param name="sep" select="$sep"/>
            <xsl:with-param name="ret" select="$ret"/>
          </xsl:call-template>
        </xsl:for-each>
      </xsl:variable>
      
      <xsl:call-template name="parse-pis">
        <xsl:with-param name="nodes" select="$nodes[position()!=1]"/>
        <xsl:with-param name="attr" select="$attr"/>
        <xsl:with-param name="sep" select="$sep"/>
        <xsl:with-param name="ret" select="$ret2"/>
        <xsl:with-param name="default" select="$default"/>
      </xsl:call-template>
      
    </xsl:otherwise>
  </xsl:choose>

</xsl:template>

<xsl:template name="parse-one-pi">
  <xsl:param name="str"/>
  <xsl:param name="attr"/>
  <xsl:param name="sep"/>
  <xsl:param name="ret"/>

  <xsl:variable name="str2">
    <xsl:call-template name="eat-leading-whitespace">
      <xsl:with-param name="str" select="$str"/>
    </xsl:call-template>
  </xsl:variable>
  
  <xsl:choose>
    <xsl:when test="$str2=''">
      <!-- done -->
      <xsl:value-of select="$ret"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:variable name="attrname" select="substring-before($str2,'=')"/>
      
      <xsl:choose>
        <xsl:when test="$attrname=''">
          <xsl:call-template name="warning">
            <xsl:with-param name="msg">bad PI syntax: <xsl:value-of select="$str2"/></xsl:with-param>
            <xsl:with-param name="inline" select="'no'"/>
          </xsl:call-template>
          <xsl:value-of select="$ret"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:variable name="remainder" select="substring($str2,2+string-length($attrname))"/>
          <xsl:choose>
            <xsl:when test="string-length($remainder) &lt; 2">
              <xsl:call-template name="warning">
                <xsl:with-param name="msg">bad PI value syntax: <xsl:value-of select="$remainder"/></xsl:with-param>
                <xsl:with-param name="inline" select="'no'"/>
              </xsl:call-template>
              <xsl:value-of select="$ret"/>
            </xsl:when>
            <xsl:otherwise>
              <xsl:variable name="rem">
                <xsl:call-template name="eat-leading-whitespace">
                  <xsl:with-param name="str" select="$remainder"/>
                </xsl:call-template>
              </xsl:variable>
              <xsl:variable name="qchars">&apos;&quot;</xsl:variable>
              <xsl:variable name="qchar" select="substring($rem,1,1)"/>
              <xsl:variable name="rem2" select="substring($rem,2)"/>
              <xsl:choose>
                <xsl:when test="not(contains($qchars,$qchar))">
                  <xsl:call-template name="warning">
                    <xsl:with-param name="msg">pseudo-attribute value needs to be quoted: <xsl:value-of select="$rem"/></xsl:with-param>
                    <xsl:with-param name="inline" select="'no'"/>
                  </xsl:call-template>
                  <xsl:value-of select="$ret"/>
                </xsl:when>
                <xsl:when test="not(contains($rem2,$qchar))">
                  <xsl:call-template name="warning">
                    <xsl:with-param name="msg">unmatched quote in: <xsl:value-of select="$rem2"/></xsl:with-param>
                    <xsl:with-param name="inline" select="'no'"/>
                  </xsl:call-template>
                  <xsl:value-of select="$ret"/>
                </xsl:when>
                <xsl:otherwise>
                  <xsl:variable name="value" select="substring-before($rem2,$qchar)"/>

                  <!-- check pseudo-attribute names -->
                  <xsl:if test="name()='rfc-ext' and $attr='SANITYCHECK'">
                    <xsl:choose>
                      <xsl:when test="$attrname='allow-markup-in-artwork'"/>
                      <xsl:when test="$attrname='authors-section'"/>
                      <xsl:when test="$attrname='duplex'"/>
                      <xsl:when test="$attrname='include-references-in-index'"/>
                      <xsl:when test="$attrname='justification'"/>
                      <xsl:when test="$attrname='parse-xml-in-artwork'"/>
                      <xsl:when test="$attrname='sec-no-trailing-dots'"/>
                      <xsl:when test="$attrname='trace-parse-xml'"/>
                      <xsl:otherwise>
                        <xsl:call-template name="warning">
                          <xsl:with-param name="msg">unsupported rfc-ext pseudo-attribute '<xsl:value-of select="$attrname"/>'</xsl:with-param>
                          <xsl:with-param name="inline" select="'no'"/>
                        </xsl:call-template>
                      </xsl:otherwise>
                    </xsl:choose>
                  </xsl:if>
                  
                  <xsl:if test="name()='rfc' and $attr='SANITYCHECK'">
                    <xsl:choose>
                      <xsl:when test="$attrname='include'">
                        <xsl:call-template name="warning">
                          <xsl:with-param name="msg">the rfc include pseudo-attribute is not supported by this processor, see http://greenbytes.de/tech/webdav/rfc2629xslt/rfc2629xslt.html#examples.internalsubset for help.</xsl:with-param>
                          <xsl:with-param name="inline" select="'no'"/>
                        </xsl:call-template>
                      </xsl:when>
                      <xsl:otherwise/>
                    </xsl:choose>
                  </xsl:if>

                  <xsl:choose>
                    <xsl:when test="$attrname != $attr">
                      <!-- pseudo-attr does not match, continue -->
                      <xsl:call-template name="parse-one-pi">
                        <xsl:with-param name="str" select="substring($rem2, 2 + string-length($value))"/>
                        <xsl:with-param name="attr" select="$attr"/>
                        <xsl:with-param name="sep" select="$sep"/>
                        <xsl:with-param name="ret" select="$ret"/>
                      </xsl:call-template>
                    </xsl:when>
                    <xsl:when test="$sep='' and $ret!=''">
                      <!-- pseudo-attr does match, but we only want one value -->
                      <xsl:if test="$ret != $value">
                        <xsl:call-template name="warning">
                          <xsl:with-param name="msg">duplicate pseudo-attribute <xsl:value-of select="$attr"/>, overwriting value <xsl:value-of select="$ret"/></xsl:with-param>
                          <xsl:with-param name="inline" select="'no'"/>
                        </xsl:call-template>
                      </xsl:if>
                      <xsl:call-template name="parse-one-pi">
                        <xsl:with-param name="str" select="substring($rem2, 2 + string-length($value))"/>
                        <xsl:with-param name="attr" select="$attr"/>
                        <xsl:with-param name="sep" select="$sep"/>
                        <xsl:with-param name="ret" select="$value"/>
                      </xsl:call-template>
                    </xsl:when>
                    <xsl:otherwise>
                      <!-- pseudo-attr does match -->
                      <xsl:call-template name="parse-one-pi">
                        <xsl:with-param name="str" select="substring($rem2, 2 + string-length($value))"/>
                        <xsl:with-param name="attr" select="$attr"/>
                        <xsl:with-param name="sep" select="$sep"/>
                        <xsl:with-param name="ret">
                          <xsl:choose>  
                            <xsl:when test="$ret!=''">
                              <xsl:value-of select="concat($ret,$sep,$value)"/>
                            </xsl:when>
                            <xsl:otherwise>
                              <xsl:value-of select="$value"/>
                            </xsl:otherwise>
                          </xsl:choose>
                        </xsl:with-param>
                      </xsl:call-template>
                    </xsl:otherwise>                  
                  
                  </xsl:choose>
                  
                </xsl:otherwise>
              </xsl:choose>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:otherwise>
  </xsl:choose>
  
</xsl:template>

<xsl:template name="eat-leading-whitespace">
  <xsl:param name="str"/>

  <xsl:choose>
    <xsl:when test="$str=''">
    </xsl:when>
    <xsl:when test="translate(substring($str,1,1),' &#10;&#13;&#9;',' ')=' '">
      <xsl:call-template name="eat-leading-whitespace">
        <xsl:with-param name="str" select="substring($str,2)"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$str"/>
    </xsl:otherwise>
  </xsl:choose>
  
</xsl:template>

<!-- diag support -->
<xsl:template name="lineno">
  <xsl:if test="function-available('saxon-old:line-number')">
    <xsl:if test="saxon-old:line-number() > 0">
      <xsl:text> (at line </xsl:text>
      <xsl:value-of select="saxon-old:line-number()"/>
      <xsl:text>)</xsl:text>
    </xsl:if>
  </xsl:if>
  <xsl:if test="function-available('saxon:line-number')">
    <xsl:if test="saxon:line-number() > 0">
      <xsl:text> (at line </xsl:text>
      <xsl:value-of select="saxon:line-number()"/>
      <xsl:text>)</xsl:text>
    </xsl:if>
  </xsl:if>
</xsl:template>

<!-- define exslt:node-set for msxml -->       
<msxsl:script language="JScript" implements-prefix="exslt">
  this['node-set'] = function (x) {
    return x;
  }
</msxsl:script>

<!-- date handling -->

<msxsl:script language="JScript" implements-prefix="date">
  this['year'] = function (x) {
    if (x) {throw "not supported"};
    return (new Date()).getFullYear();
  }

  this['month-in-year'] = function (x) {
    if (x) {throw "not supported"};
    return 1 + (new Date()).getMonth();
  }

  this['day-in-month'] = function (x) {
    if (x) {throw "not supported"};
    return (new Date()).getDate();
  }
</msxsl:script>

<xsl:variable name="may-default-dates">
  <xsl:choose>
    <xsl:when test="function-available('date:year') and function-available('date:month-in-year') and function-available('date:day-in-month')">
      <xsl:variable name="year-specified" select="/rfc/front/date/@year and /rfc/front/date/@year!=''"/>
      <xsl:variable name="month-specified" select="/rfc/front/date/@month and /rfc/front/date/@month!=''"/>
      <xsl:variable name="day-specified" select="/rfc/front/date/@day and /rfc/front/date/@day!=''"/>
      <xsl:variable name="system-month">
        <xsl:call-template name="get-month-as-name">
          <xsl:with-param name="month" select="date:month-in-year()"/>
        </xsl:call-template>
      </xsl:variable>
      <xsl:choose>
        <xsl:when test="$year-specified and /rfc/front/date/@year!=date:year()">Specified year <xsl:value-of select="/rfc/front/date/@year"/> does not match system date (<xsl:value-of select="date:year()"/>)</xsl:when>
        <xsl:when test="$month-specified and /rfc/front/date/@month!=$system-month">Specified month <xsl:value-of select="/rfc/front/date/@month"/> does not match system date (<xsl:value-of select="$system-month"/>)</xsl:when>
        <xsl:when test="$day-specified and /rfc/front/date/@day!=date:day-in-month()">Specified day does not match system date</xsl:when>
        <xsl:when test="not($year-specified) and ($month-specified or $day-specified)">Can't default year when month or day is specified</xsl:when>
        <xsl:when test="not($month-specified) and $day-specified">Can't default month when day is specified</xsl:when>
        <xsl:otherwise>yes</xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <!-- may, but won't -->
    <xsl:otherwise>yes</xsl:otherwise> 
  </xsl:choose>
</xsl:variable>

<xsl:param name="xml2rfc-ext-pub-year">
  <xsl:choose>
    <xsl:when test="/rfc/front/date/@year and /rfc/front/date/@year!=''">
      <xsl:value-of select="/rfc/front/date/@year"/>
    </xsl:when>
    <xsl:when test="function-available('date:year') and $may-default-dates='yes'">
      <xsl:value-of select="date:year()"/>
    </xsl:when>
    <xsl:when test="function-available('date:year') and $may-default-dates!='yes'">
      <xsl:call-template name="warning">
        <xsl:with-param name="inline" select="'no'"/>
        <xsl:with-param name="msg" select="$may-default-dates"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="'/rfc/front/date/@year missing (and XSLT processor cannot compute the system date)'"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:param>

<xsl:param name="xml2rfc-ext-pub-month">
  <xsl:choose>
    <xsl:when test="/rfc/front/date/@month and /rfc/front/date/@month!=''">
      <xsl:value-of select="/rfc/front/date/@month"/>
    </xsl:when>
    <xsl:when test="function-available('date:month-in-year') and $may-default-dates='yes'">
      <xsl:call-template name="get-month-as-name">
        <xsl:with-param name="month" select="date:month-in-year()"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="function-available('date:month-in-year') and $may-default-dates!='yes'">
      <xsl:call-template name="warning">
        <xsl:with-param name="inline" select="'no'"/>
        <xsl:with-param name="msg" select="$may-default-dates"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="'/rfc/front/date/@month missing (and XSLT processor cannot compute the system date)'"/>
      </xsl:call-template>
    </xsl:otherwise>
  </xsl:choose>
</xsl:param>

<xsl:param name="pub-month-numeric">
  <xsl:call-template name="get-month-as-num">
    <xsl:with-param name="month" select="$xml2rfc-ext-pub-month" />
  </xsl:call-template>
</xsl:param>

<xsl:param name="xml2rfc-ext-pub-day">
  <xsl:choose>
    <xsl:when test="/rfc/front/date/@day and /rfc/front/date/@day!=''">
      <xsl:value-of select="/rfc/front/date/@day"/>
    </xsl:when>
    <xsl:when test="function-available('date:day-in-month') and $may-default-dates='yes'">
      <xsl:value-of select="date:day-in-month()"/>
    </xsl:when>
    <xsl:otherwise /> <!-- harmless, we just don't have it -->
  </xsl:choose>
</xsl:param>

<xsl:param name="pub-yearmonth">
  <!-- year or 0000 -->
  <xsl:choose>
    <xsl:when test="$xml2rfc-ext-pub-year!=''">
      <xsl:value-of select="format-number($xml2rfc-ext-pub-year,'0000')"/>
    </xsl:when>
    <xsl:otherwise>0000</xsl:otherwise>
  </xsl:choose>
  <!-- month or 00 -->
  <xsl:choose>
    <xsl:when test="$pub-month-numeric &gt; 0">
      <xsl:value-of select="format-number($pub-month-numeric,'00')"/>
    </xsl:when>
    <xsl:otherwise>00</xsl:otherwise>
  </xsl:choose>

</xsl:param>

</xsl:transform>