<?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,v 1.2 2001/06/23 17:06:39 veillard Exp $
********************************************************************
This file is part of the XSL DocBook Stylesheet distribution.
See ../README or http://nwalsh.com/docbook/xsl/ for copyright
and other information.
******************************************************************** -->
<doc:reference xmlns="">
<referenceinfo>
<releaseinfo role="meta">
$Id: ebnf.xsl,v 1.2 2001/06/23 17:06:39 veillard Exp $
</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>
<!-- This module formats EBNF tables. The DTD that this supports is -->
<!-- under development by the DocBook community. This code is -->
<!-- experimental and is not (yet) part of the DocBook stylesheets. -->
<xsl:include href="docbook.xsl"/>
<!-- ==================================================================== -->
<xsl:param name="ebnf.table.bgcolor">#F5DCB3</xsl:param>
<doc:param name="ebnf.table.bgcolor" xmlns="">
<refpurpose>Background color for EBNF tables</refpurpose>
<refdescription>
<para>Sets the background color for EBNF tables. No <sgmltag>bgcolor</sgmltag>
attribute is output if <varname>ebnf.table.bgcolor</varname> is set to
the null string. The default value matches the value used in recent
online versions of the W3C's XML Spec productions.</para>
</refdescription>
</doc:param>
<xsl:param name="ebnf.table.border">1</xsl:param>
<doc:param name="ebnf.table.border" xmlns="">
<refpurpose>Selects border on EBNF tables</refpurpose>
<refdescription>
<para>Selects the border on EBNF tables. If non-zero, the tables have
borders, otherwise they don't.</para>
</refdescription>
</doc:param>
<!-- ==================================================================== -->
<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="$ebnf.table.border != 0">
<xsl:attribute name="border">1</xsl:attribute>
</xsl:if>
<xsl:attribute name="class">
<xsl:value-of select="name(.)"/>
</xsl:attribute>
<xsl:attribute name="summary">
<xsl:text>EBNF</xsl:text>
<xsl:if test="title">
<xsl:text> for </xsl:text>
<xsl:value-of select="title"/>
</xsl:if>
</xsl:attribute>
<xsl:if test="title">
<tr>
<th align="left" valign="top" class="{name(.)}">
<xsl:apply-templates select="title"/>
</th>
</tr>
</xsl:if>
<tr>
<td>
<table border="0" width="99%" cellpadding="0">
<xsl:if test="$ebnf.table.bgcolor != ''">
<xsl:attribute name="bgcolor">
<xsl:value-of select="$ebnf.table.bgcolor"/>
</xsl:attribute>
</xsl:if>
<xsl:attribute name="class">
<xsl:value-of select="name(.)"/>
</xsl:attribute>
<xsl:attribute name="summary">EBNF productions</xsl:attribute>
<xsl:apply-templates select="production|productionrecap"/>
</table>
</td>
</tr>
</table>
</xsl:template>
<xsl:template match="productionset/title">
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="production">
<xsl:param name="recap" select="false()"/>
<xsl:variable name="id"><xsl:call-template name="object.id"/></xsl:variable>
<tr>
<td align="left" valign="top" width="3%">
<xsl:text>[</xsl:text>
<xsl:number count="production" level="any"/>
<xsl:text>]</xsl:text>
</td>
<td align="right" valign="top" width="10%">
<xsl:choose>
<xsl:when test="$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>
<a name="{$id}"/>
<xsl:apply-templates select="lhs"/>
</xsl:otherwise>
</xsl:choose>
</td>
<td valign="top" width="5%" align="center"><tt>::=</tt></td>
<td valign="top" width="52%">
<xsl:apply-templates select="rhs"/>
</td>
<td align="left" valign="top" width="30%">
<xsl:choose>
<xsl:when test="rhs/lineannotation|constraint">
<xsl:apply-templates select="rhs/lineannotation" mode="rhslo"/>
<xsl:apply-templates select="constraint"/>
</xsl:when>
<xsl:otherwise>
<xsl:text> </xsl:text>
</xsl:otherwise>
</xsl:choose>
</td>
</tr>
</xsl:template>
<xsl:template match="productionrecap">
<xsl:variable name="targets" select="id(@linkend)"/>
<xsl:variable name="target" select="$targets[1]"/>
<xsl:if test="$check.idref = '1'">
<xsl:if test="count($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($targets)>1">
<xsl:message>
<xsl:text>Warning: multiple "IDs" for productionrecap linkend: </xsl:text>
<xsl:value-of select="@linkend"/>
<xsl:text>.</xsl:text>
</xsl:message>
</xsl:if>
</xsl:if>
<xsl:apply-templates select="$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: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="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="$linkend != ''">
<xsl:variable name="targets" select="id($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>/* </xsl:text>
<xsl:apply-templates/>
<xsl:text> */</xsl:text>
</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="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:if test="preceding-sibling::constraint">
<br/>
</xsl:if>
<xsl:text>[ </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="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="id(@linkend)"/>
<xsl:variable name="target" select="$targets[1]"/>
<xsl:apply-templates select="$target" mode="title.markup"/>
</a>
<xsl:text> ]</xsl:text>
</xsl:template>
<xsl:template match="constraintdef">
<div class="{name(.)}">
<xsl:apply-templates/>
</div>
</xsl:template>
<xsl:template match="constraintdef/title">
<p><b><xsl:apply-templates/></b></p>
</xsl:template>
<!-- ==================================================================== -->
</xsl:stylesheet>