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+<?xml version='1.0'?>
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+                xmlns:doc="http://nwalsh.com/xsl/documentation/1.0"
+                exclude-result-prefixes="doc"
+                version='1.0'>
+
+<!-- ********************************************************************
+     $Id: ebnf.xsl 8178 2008-12-15 22:26:38Z bobstayton $
+     ********************************************************************
+
+     This file is part of the XSL DocBook Stylesheet distribution.
+     See ../README or http://docbook.sf.net/release/xsl/current/ for
+     copyright and other information.
+
+     ******************************************************************** -->
+
+<doc:reference xmlns="">
+<referenceinfo>
+<releaseinfo role="meta">
+$Id: ebnf.xsl 8178 2008-12-15 22:26:38Z bobstayton $
+</releaseinfo>
+<author><surname>Walsh</surname>
+<firstname>Norman</firstname></author>
+<copyright><year>1999</year><year>2000</year>
+<holder>Norman Walsh</holder>
+</copyright>
+</referenceinfo>
+<title>HTML EBNF Reference</title>
+
+<partintro>
+<section><title>Introduction</title>
+
+<para>This is technical reference documentation for the DocBook XSL
+Stylesheets; it documents (some of) the parameters, templates, and
+other elements of the stylesheets.</para>
+
+<para>This reference describes the templates and parameters relevant
+to formatting EBNF markup.</para>
+
+<para>This is not intended to be <quote>user</quote> documentation.
+It is provided for developers writing customization layers for the
+stylesheets, and for anyone who's interested in <quote>how it
+works</quote>.</para>
+
+<para>Although I am trying to be thorough, this documentation is known
+to be incomplete. Don't forget to read the source, too :-)</para>
+</section>
+</partintro>
+</doc:reference>
+
+<!-- ==================================================================== -->
+
+<xsl:template match="productionset">
+  <table width="100%" cellpadding="5">
+    <xsl:if test="$ebnf.table.bgcolor != ''">
+      <xsl:attribute name="bgcolor">
+        <xsl:value-of select="$ebnf.table.bgcolor"/>
+      </xsl:attribute>
+    </xsl:if>
+    <xsl:if test="$ebnf.table.border != 0">
+      <xsl:attribute name="border">1</xsl:attribute>
+    </xsl:if>
+    <xsl:attribute name="class">
+      <xsl:value-of select="local-name(.)"/>
+    </xsl:attribute>
+    <xsl:attribute name="summary">
+      <xsl:text>EBNF</xsl:text>
+      <xsl:if test="title">
+        <xsl:text> for </xsl:text>
+        <xsl:value-of select="title"/>
+      </xsl:if>
+    </xsl:attribute>
+
+    <xsl:if test="title">
+      <tr>
+        <th align="{$direction.align.start}" valign="top">
+          <xsl:apply-templates select="." mode="class.attribute"/>
+          <xsl:apply-templates select="title"/>
+        </th>
+      </tr>
+    </xsl:if>
+    <tr>
+      <td>
+        <table border="0" width="99%" cellpadding="0">
+          <xsl:if test="$ebnf.table.bgcolor != ''">
+            <xsl:attribute name="bgcolor">
+              <xsl:value-of select="$ebnf.table.bgcolor"/>
+            </xsl:attribute>
+          </xsl:if>
+          <xsl:attribute name="class">
+            <xsl:value-of select="local-name(.)"/>
+          </xsl:attribute>
+          <xsl:attribute name="summary">EBNF productions</xsl:attribute>
+          <xsl:apply-templates select="production|productionrecap"/>
+        </table>
+      </td>
+    </tr>
+  </table>
+</xsl:template>
+
+<xsl:template match="productionset/title">
+  <xsl:apply-templates/>
+</xsl:template>
+
+<xsl:template match="production">
+  <xsl:param name="recap" select="false()"/>
+  <tr>
+    <td align="{$direction.align.start}" valign="top" width="3%">
+      <xsl:text>[</xsl:text>
+      <xsl:number count="production" level="any"/>
+      <xsl:text>]</xsl:text>
+    </td>
+    <td align="{$direction.align.end}" valign="top" width="10%">
+      <xsl:choose>
+        <xsl:when test="$recap">
+          <a>
+            <xsl:attribute name="href">
+              <xsl:call-template name="href.target">
+                <xsl:with-param name="object" select="."/>
+              </xsl:call-template>
+            </xsl:attribute>
+            <xsl:apply-templates select="lhs"/>
+          </a>
+        </xsl:when>
+        <xsl:otherwise>
+          <xsl:call-template name="anchor"/>
+          <xsl:apply-templates select="lhs"/>
+        </xsl:otherwise>
+      </xsl:choose>
+    </td>
+    <td valign="top" width="5%" align="center">
+      <xsl:copy-of select="$ebnf.assignment"/>
+    </td>
+    <td valign="top" width="52%">
+      <xsl:apply-templates select="rhs"/>
+      <xsl:copy-of select="$ebnf.statement.terminator"/>
+    </td>
+    <td align="{$direction.align.start}" valign="top" width="30%">
+      <xsl:choose>
+        <xsl:when test="rhs/lineannotation|constraint">
+          <xsl:apply-templates select="rhs/lineannotation" mode="rhslo"/>
+          <xsl:apply-templates select="constraint"/>
+        </xsl:when>
+        <xsl:otherwise>
+          <xsl:text>&#160;</xsl:text>
+        </xsl:otherwise>
+      </xsl:choose>
+    </td>
+  </tr>
+</xsl:template>
+
+<xsl:template match="productionrecap">
+  <xsl:variable name="targets" select="key('id',@linkend)"/>
+  <xsl:variable name="target" select="$targets[1]"/>
+
+  <xsl:if test="count($targets)=0">
+    <xsl:message>
+      <xsl:text>Error: no ID for productionrecap linkend: </xsl:text>
+      <xsl:value-of select="@linkend"/>
+      <xsl:text>.</xsl:text>
+    </xsl:message>
+  </xsl:if>
+
+  <xsl:if test="count($targets)>1">
+    <xsl:message>
+      <xsl:text>Warning: multiple "IDs" for productionrecap linkend: </xsl:text>
+      <xsl:value-of select="@linkend"/>
+      <xsl:text>.</xsl:text>
+    </xsl:message>
+  </xsl:if>
+
+  <xsl:apply-templates select="$target">
+    <xsl:with-param name="recap" select="true()"/>
+  </xsl:apply-templates>
+</xsl:template>
+
+<xsl:template match="lhs">
+  <xsl:apply-templates/>
+</xsl:template>
+
+<xsl:template match="rhs">
+  <xsl:apply-templates/>
+  <xsl:if test="following-sibling::rhs">
+    <xsl:text> |</xsl:text>
+    <br/>
+  </xsl:if>
+</xsl:template>
+
+<xsl:template match="nonterminal">
+  <xsl:variable name="linkend">
+    <xsl:call-template name="xpointer.idref">
+      <xsl:with-param name="xpointer" select="@def"/>
+    </xsl:call-template>
+  </xsl:variable>
+
+  <xsl:call-template name="check.id.unique">
+    <xsl:with-param name="linkend" select="$linkend"/>
+  </xsl:call-template>
+
+  <xsl:call-template name="check.idref.targets">
+    <xsl:with-param name="linkend" select="$linkend"/>
+    <xsl:with-param name="element-list">production</xsl:with-param>
+  </xsl:call-template>
+
+  <!-- If you don't provide content, you can't point outside this doc. -->
+  <xsl:choose>
+    <xsl:when test="*|text()"><!--nop--></xsl:when>
+    <xsl:otherwise>
+      <xsl:if test="$linkend = ''">
+        <xsl:message>
+          <xsl:text>Non-terminals with no content must point to </xsl:text>
+          <xsl:text>production elements in the current document.</xsl:text>
+        </xsl:message>
+        <xsl:message>
+          <xsl:text>Invalid xpointer for empty nt: </xsl:text>
+          <xsl:value-of select="@def"/>
+        </xsl:message>
+      </xsl:if>
+    </xsl:otherwise>
+  </xsl:choose>
+
+  <xsl:variable name="href">
+    <xsl:choose>
+      <xsl:when test="$linkend != ''">
+        <xsl:variable name="targets" select="key('id',$linkend)"/>
+        <xsl:variable name="target" select="$targets[1]"/>
+        <xsl:call-template name="href.target">
+          <xsl:with-param name="object" select="$target"/>
+        </xsl:call-template>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:value-of select="@def"/>
+      </xsl:otherwise>
+    </xsl:choose>
+  </xsl:variable>
+
+  <a href="{$href}">
+    <xsl:choose>
+      <xsl:when test="*|text()">
+        <xsl:apply-templates/>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:choose>
+          <xsl:when test="$linkend != ''">
+            <xsl:variable name="targets" select="key('id',$linkend)"/>
+            <xsl:variable name="target" select="$targets[1]"/>
+            <xsl:apply-templates select="$target/lhs"/>
+          </xsl:when>
+          <xsl:otherwise>
+            <xsl:text>???</xsl:text>
+          </xsl:otherwise>
+        </xsl:choose>
+      </xsl:otherwise>
+    </xsl:choose>
+  </a>
+</xsl:template>
+
+<xsl:template match="rhs/lineannotation">
+  <!--nop-->
+</xsl:template>
+
+<xsl:template match="rhs/lineannotation" mode="rhslo">
+  <xsl:text>/*&#160;</xsl:text>
+  <xsl:apply-templates/>
+  <xsl:text>&#160;*/</xsl:text>
+  <br/>
+</xsl:template>
+
+<xsl:template match="constraint">
+  <xsl:call-template name="check.id.unique">
+    <xsl:with-param name="linkend" select="@linkend"/>
+  </xsl:call-template>
+
+  <xsl:call-template name="check.idref.targets">
+    <xsl:with-param name="linkend" select="@linkend"/>
+    <xsl:with-param name="element-list">constraintdef</xsl:with-param>
+  </xsl:call-template>
+
+  <xsl:variable name="href">
+    <xsl:variable name="targets" select="key('id',@linkend)"/>
+    <xsl:variable name="target" select="$targets[1]"/>
+    <xsl:call-template name="href.target">
+      <xsl:with-param name="object" select="$target"/>
+    </xsl:call-template>
+  </xsl:variable>
+
+  <xsl:text>[&#160;</xsl:text>
+
+  <xsl:choose>
+    <xsl:when test="@role">
+      <xsl:value-of select="@role"/>
+      <xsl:text>: </xsl:text>
+    </xsl:when>
+    <xsl:otherwise>
+      <xsl:variable name="targets" select="key('id',@linkend)"/>
+      <xsl:variable name="target" select="$targets[1]"/>
+      <xsl:if test="$target/@role">
+        <xsl:value-of select="$target/@role"/>
+        <xsl:text>: </xsl:text>
+      </xsl:if>
+    </xsl:otherwise>
+  </xsl:choose>
+
+  <a href="{$href}">
+    <xsl:variable name="targets" select="key('id',@linkend)"/>
+    <xsl:variable name="target" select="$targets[1]"/>
+    <xsl:apply-templates select="$target" mode="title.markup"/>
+  </a>
+  <xsl:text>&#160;]</xsl:text>
+  <xsl:if test="following-sibling::constraint">
+    <br/>
+  </xsl:if>
+</xsl:template>
+
+<xsl:template match="constraintdef">
+  <div>
+    <xsl:apply-templates select="." mode="class.attribute"/>
+    <xsl:call-template name="anchor"/>
+    <xsl:apply-templates/>
+  </div>
+</xsl:template>
+
+<xsl:template match="constraintdef/title">
+  <p><b><xsl:apply-templates/></b></p>
+</xsl:template>
+
+<!-- ==================================================================== -->
+
+</xsl:stylesheet>