<!--
    XSLT transformation from RFC2629 XML format to HTML

    Copyright (c) 2006-2009, 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>

<!-- 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>

<!-- 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="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 >= 2009-12 
     for IDs, and around 2009-09 for RFCs-->
<xsl:variable name="ipr-2009-09" select="(
    ( not(/rfc/@number) and $pub-yearmonth >= 200912 )
    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 
    )
  )" />

<!-- see http://mailman.rfc-editor.org/pipermail/rfc-interest/2009-June/001373.html -->
<!-- for IDs, implement the change as 2009-12 -->
<xsl:variable name="abstract-first" select="(
    (/rfc/@number and $pub-yearmonth >= 200907)
    or
    (not(/rfc/@number) and $pub-yearmonth >= 200912)
  )" />

<!-- 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" />

<!-- Templates for the various elements of rfc2629.dtd -->
              
<xsl:template match="text()[not(ancestor::artwork)]">
  <xsl:variable name="starts-with-ws" select="translate(substring(.,1,1),'&#9;&#10;&#13;&#32;','')"/>
  <xsl:variable name="ends-with-ws" select="translate(substring(.,string-length(.),1),'&#9;&#10;&#13;&#32;','')"/>
  <!--<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>
        <!-- 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:value-of select="." />
              </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:value-of select="address/postal/city" /></span>, </xsl:if>
              <xsl:if test="address/postal/region"><span class="region"><xsl:value-of select="address/postal/region" /></span>&#160;</xsl:if>
              <xsl:if test="address/postal/code"><span class="postal-code"><xsl:value-of select="address/postal/code" /></span></xsl:if>
            </span>
          </xsl:if>
          <xsl:if test="address/postal/country">
            <span class="country-name vcardline"><xsl:value-of select="address/postal/country" /></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>
        </span>
      </xsl:for-each>
    </address>

</xsl:template>

<xsl:template match="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="*[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" border="0" cellpadding="1" cellspacing="1">
      <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)]">
  <dl class="empty">
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </dl>
</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">-->
  <dd>
    <xsl:call-template name="copy-anchor"/>
    <xsl:call-template name="insertInsDelClass"/>
    <xsl:apply-templates />
  </dd>
</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>

  <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">
  
  <!-- conformance checks -->
  <xsl:if test="$xml2rfc-symrefs!='no' and $xml2rfc-symrefs!='yes' and //reference">
    <xsl:call-template name="warning">
      <xsl:with-param name="inline" select="'no'"/>
      <xsl:with-param name="msg">symrefs PI not specified; default has changed from 'no' to 'yes'.</xsl:with-param>
    </xsl:call-template>
  </xsl:if>
  
  <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: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=''">
        <link rel="Copyright" href="#{$anchor-prefix}.copyright" />
      </xsl:if>
      <xsl:if test="$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.DC" href="http://purl.org/dc/elements/1.1/" />
              
        <!-- DC creator, see RFC2731 -->
        <xsl:for-each select="front/author">
          <xsl:variable name="initials">
            <xsl:call-template name="format-initials"/>
          </xsl:variable>
          <meta name="DC.Creator" content="{concat(@surname,', ',$initials)}" />
        </xsl:for-each>
        
        <xsl:if test="$xml2rfc-private=''">
          <xsl:choose>
            <xsl:when test="@number">
              <meta name="DC.Identifier" content="urn:ietf:rfc:{@number}" />
            </xsl:when>
            <xsl:when test="@docName">
              <meta name="DC.Identifier" content="urn:ietf:id:{@docName}" />
            </xsl:when>
            <xsl:otherwise/>
          </xsl:choose>
          <meta name="DC.Date.Issued" scheme="ISO8601">
            <xsl:attribute name="content">
              <xsl:value-of select="concat($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="DC.Description.Abstract" content="{normalize-space(front/abstract)}" />
        </xsl:if>      

        <xsl:if test="@number">
          <meta name="DC.isPartOf" content="urn:issn:2070-1721" />
        </xsl:if>      

      </xsl:if>
      
      <!-- this replicates dc.description.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:apply-templates select="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>
      <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(ancestor::ed:del)">
      <xsl:call-template name="error">
        <xsl:with-param name="msg" select="concat('Undefined target: ',$xref/@target)"/>
      </xsl:call-template>
    </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">
  
        <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:message>ERROR: no XSLT template for element: &lt;<xsl:value-of select="name()"/>&gt;</xsl:message>    
  <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/front/workgroup">
        <xsl:for-each select="/rfc/front/workgroup">
          <myns:item><xsl:value-of select="."/></myns:item>
        </xsl:for-each>
      </xsl:when>
      <xsl:otherwise>
        <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/@docName and $mode!='nroff'">
      <myns:item>
        &lt;<xsl:value-of select="/rfc/@docName" />&gt;
      </myns:item>
    </xsl:if>
    <xsl:if test="/rfc/@obsoletes and /rfc/@obsoletes!=''">
      <myns:item>
        <xsl:text>Obsoletes: </xsl:text>
        <xsl:call-template name="rfclist">
          <xsl:with-param name="list" select="normalize-space(/rfc/@obsoletes)" />
        </xsl:call-template>
        <xsl:if test="not(/rfc/@number)"> (if approved)</xsl:if>
      </myns:item>
    </xsl:if>
    <xsl:if test="/rfc/@seriesNo">
       <myns:item>
        <xsl:choose>
          <xsl:when test="/rfc/@category='bcp'">BCP: <xsl:value-of select="/rfc/@seriesNo" /></xsl:when>
          <xsl:when test="/rfc/@category='info'">FYI: <xsl:value-of select="/rfc/@seriesNo" /></xsl:when>
          <xsl:when test="/rfc/@category='std'">STD: <xsl:value-of select="/rfc/@seriesNo" /></xsl:when>
          <xsl:otherwise><xsl:value-of select="concat(/rfc/@category,': ',/rfc/@seriesNo)" /></xsl:otherwise>
        </xsl:choose>
      </myns:item>
    </xsl:if>
    <xsl:if test="/rfc/@updates and /rfc/@updates!=''">
      <myns:item>
        <xsl:text>Updates: </xsl:text>
          <xsl:call-template name="rfclist">
             <xsl:with-param name="list" select="normalize-space(/rfc/@updates)" />
          </xsl:call-template>
          <xsl:if test="not(/rfc/@number)"> (if approved)</xsl:if>
      </myns:item>
    </xsl:if>
    <xsl:if test="$mode!='nroff'">
      <myns:item>
        <xsl:choose>
          <xsl:when test="/rfc/@number">
            <xsl:text>Category: </xsl:text>
          </xsl:when>
          <xsl:otherwise>
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  <xsl:variable name="escapeclause">
    This document may contain material from IETF Documents or IETF Contributions published or
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            This document is an Internet-Draft and is 
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            This document is an Internet-Draft and is subject to all provisions
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            This document is an Internet-Draft and is subject to all provisions
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            author represents that any applicable patent or other IPR claims of
            which he or she is aware have been or will be disclosed, and any of
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<!-- Nop -->
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<!-- cleanup for ins/del -->

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<xsl:template match="text()" mode="cleanup-edits"><xsl:copy/></xsl:template>

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<xsl:template match="ed:del" mode="cleanup-edits"/>

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<!-- ABNF support -->
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<xsl:template match="ed:eref" mode="issuehtml">
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        <xsl:sort select="@name" />
        <tr>
          <td><a href="#{$anchor-prefix}.issue.{@name}"><xsl:value-of select="@name" /></a></td>
          <td><xsl:value-of select="@type" /></td>
          <td><xsl:value-of select="@status" /></td>
          <td><xsl:value-of select="ed:item[1]/@date" /></td>
          <td><a href="mailto:{ed:item[1]/@entered-by}?subject={/rfc/@docName},%20{@name}"><xsl:value-of select="ed:item[1]/@entered-by" /></a></td>
        </tr>
      </xsl:for-each>
    </tbody>
  </table>
  
</xsl:template>

<xsl:template name="insert-diagnostics">
  
  <!-- check anchor names -->
  <xsl:variable name="badAnchors"
    select="//*[starts-with(@anchor,concat($anchor-prefix,'.'))][@anchor!=concat($anchor-prefix,'.authors') and /*/x:assign-section-number[@number='suppress' and @builtin-target='authors']]" />
  
  <xsl:if test="$badAnchors">
    <xsl:variable name="text">
      The following anchor names may collide with internally generated anchors because of their prefix "<xsl:value-of select="$anchor-prefix" />":
      <xsl:for-each select="$badAnchors">
        <xsl:value-of select="@anchor"/><xsl:if test="position()!=last()">, </xsl:if>
      </xsl:for-each>
    </xsl:variable>
    <xsl:call-template name="warning">
      <xsl:with-param name="msg"><xsl:value-of select="$text"/></xsl:with-param>
    </xsl:call-template>
  </xsl:if>
  
  <!-- check ABNF syntax references -->
  <xsl:if test="//artwork[@type='abnf2616']">
    <xsl:if test="not(//reference/seriesInfo[@name='RFC' and (@value='2068' or @value='2616')])">
      <xsl:call-template name="warning">
        <xsl:with-param name="inline">no</xsl:with-param>
        <xsl:with-param name="msg">document uses HTTP-style ABNF syntax, but doesn't reference RFC 2068 or 2616.</xsl:with-param>
      </xsl:call-template>
    </xsl:if>
  </xsl:if>
  <xsl:if test="//artwork[@type='abnf']">
    <xsl:if test="not(//reference/seriesInfo[@name='RFC' and (@value='2234' or @value='4234' or @value='5234')])">
      <xsl:call-template name="warning">
        <xsl:with-param name="inline">no</xsl:with-param>
        <xsl:with-param name="msg">document uses ABNF syntax, but doesn't reference RFC 2234, 4234 or 5234.</xsl:with-param>
      </xsl:call-template>
    </xsl:if>
  </xsl:if>
  
  <!-- check IDs -->
  <xsl:variable name="badTargets" select="//xref[not(@target=//@anchor) and not(ancestor::ed:del)]" />
  <xsl:if test="$badTargets">
    <xsl:variable name="text">
      The following target names do not exist:
      <xsl:for-each select="$badTargets">
        <xsl:value-of select="@target"/><xsl:if test="position()!=last()">, </xsl:if>
      </xsl:for-each>
    </xsl:variable>
    <xsl:call-template name="warning">
      <xsl:with-param name="msg"><xsl:value-of select="$text"/></xsl:with-param>
    </xsl:call-template>
  </xsl:if>
 
  
</xsl:template>

<!-- special change mark support, not supported by RFC2629 yet -->

<xsl:template match="@ed:*" />

<xsl:template match="ed:del">
  <xsl:call-template name="insert-issue-pointer"/>
  <del>
    <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 />
  </del>
</xsl:template>

<xsl:template match="ed:ins">
  <xsl:call-template name="insert-issue-pointer"/>
  <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 />
  </ins>
</xsl:template>

<xsl:template name="insert-issue-pointer">
  <xsl:param name="deleted-anchor"/>
  <xsl:variable name="change" select="."/>
  <xsl:for-each select="@ed:resolves|ed:resolves">
    <xsl:variable name="resolves" select="."/>
    <!-- need the right context node for proper numbering -->
    <xsl:variable name="count"><xsl:for-each select=".."><xsl:number level="any" count="*[@ed:resolves=$resolves or ed:resolves=$resolves]" /></xsl:for-each></xsl:variable>
    <xsl:variable name="total" select="count(//*[@ed:resolves=$resolves or ed:resolves=$resolves])" />
    <xsl:variable name="id">
      <xsl:value-of select="$anchor-prefix"/>.change.<xsl:value-of select="$resolves"/>.<xsl:value-of select="$count" />
    </xsl:variable>
    <xsl:choose>
      <!-- block level? -->
      <xsl:when test="not(ancestor::t) and not(ancestor::title) and not(ancestor::figure) and not($change/@ed:old-title)">
        <div class="issuepointer noprint">
          <xsl:if test="not($deleted-anchor)">
            <xsl:attribute name="id"><xsl:value-of select="$id"/></xsl:attribute>
          </xsl:if>
          <xsl:if test="$count > 1">
            <a class="bg-issue" title="previous change for {$resolves}" href="#{$anchor-prefix}.change.{$resolves}.{$count - 1}">&#x2191;</a>
          </xsl:if>
          <a class="open-issue" href="#{$anchor-prefix}.issue.{$resolves}" title="resolves: {$resolves}">
            <xsl:choose>
              <xsl:when test="//ed:issue[@name=$resolves and @status='closed']">
                <xsl:attribute name="class">closed-issue</xsl:attribute>
              </xsl:when>
              <xsl:when test="//ed:issue[@name=$resolves and @status='editor']">
                <xsl:attribute name="class">editor-issue</xsl:attribute>
              </xsl:when>
              <xsl:otherwise>
                <xsl:attribute name="class">open-issue</xsl:attribute>
              </xsl:otherwise>
            </xsl:choose>
            <xsl:text>&#160;I&#160;</xsl:text>
          </a>
          <xsl:if test="$count &lt; $total">
            <a class="bg-issue" title="next change for {$resolves}" href="#{$anchor-prefix}.change.{$resolves}.{$count + 1}">&#x2193;</a>
          </xsl:if>
          <xsl:text>&#160;</xsl:text>
        </div>
      </xsl:when>
      <xsl:otherwise>
        <xsl:if test="$count > 1">
          <a class="bg-issue" title="previous change for {$resolves}" href="#{$anchor-prefix}.change.{$resolves}.{$count - 1}">&#x2191;</a>
        </xsl:if>
        <a title="resolves: {$resolves}" href="#{$anchor-prefix}.issue.{$resolves}">
          <xsl:if test="not($deleted-anchor)">
            <xsl:attribute name="id"><xsl:value-of select="$id"/></xsl:attribute>
          </xsl:if>
          <xsl:choose>
            <xsl:when test="//ed:issue[@name=$resolves and @status='closed']">
              <xsl:attribute name="class">closed-issue noprint</xsl:attribute>
            </xsl:when>
            <xsl:when test="//ed:issue[@name=$resolves and @status='editor']">
              <xsl:attribute name="class">editor-issue noprint</xsl:attribute>
            </xsl:when>
            <xsl:otherwise>
              <xsl:attribute name="class">open-issue noprint</xsl:attribute>
            </xsl:otherwise>
          </xsl:choose>
          <xsl:text>&#160;I&#160;</xsl:text>
        </a>
        <xsl:if test="$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="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="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: 1.473 $',':')">
      <xsl:value-of select="concat('Revision ',normalize-space(translate(substring-after('$Revision: 1.473 $', 'Revision: '),'$','')),', ')" />
    </xsl:if>
    <xsl:if test="contains('$Date: 2009-09-24 16:05:25 $',':')">
      <xsl:value-of select="concat(normalize-space(translate(substring-after('$Date: 2009-09-24 16:05:25 $', 'Date: '),'$','')),', ')" />
    </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>

<!-- 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: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: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>