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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"
+ xmlns:dyn="http://exslt.org/dynamic"
+ xmlns:saxon="http://icl.com/saxon"
+ xmlns:xlink="http://www.w3.org/1999/xlink"
+ exclude-result-prefixes="doc dyn saxon"
+ version='1.0'>
+
+<!-- ********************************************************************
+ $Id: charmap.xsl 7266 2007-08-22 11:58:42Z xmldoc $
+ ********************************************************************
+
+ 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="" xml:id="charmap">
+ <info>
+ <title>Common » Character-Map Template Reference</title>
+ <releaseinfo role="meta">
+ $Id: charmap.xsl 7266 2007-08-22 11:58:42Z xmldoc $
+ </releaseinfo>
+ </info>
+ <!-- * yes, partintro is a valid child of a reference... -->
+ <partintro xml:id="partintro">
+ <title>Introduction</title>
+ <para>This is technical reference documentation for the
+ character-map templates in the DocBook XSL Stylesheets.</para>
+ <note>
+ <para>These templates are defined in a separate file from the set
+ of “common” templates because some of the common templates
+ reference DocBook XSL stylesheet parameters, requiring the
+ entire set of parameters to be imported/included in any
+ stylesheet that imports/includes the common templates.</para>
+ <para>The character-map templates don’t import or include
+ any DocBook XSL stylesheet parameters, so the
+ character-map templates can be used without importing the
+ whole set of parameters.</para>
+ </note>
+ <para>This is not intended to be user documentation. It is
+ provided for developers writing customization layers for the
+ stylesheets.</para>
+ </partintro>
+</doc:reference>
+
+<!-- ===================================== -->
+<doc:template name="apply-character-map" xmlns="">
+ <refpurpose>Applies an XSLT character map</refpurpose>
+ <refdescription id="apply-character-map-desc">
+ <para>This template applies an <link
+ xlink:href="http://www.w3.org/TR/xslt20/#character-maps"
+ >XSLT character map</link>; that is, it causes certain
+ individual characters to be substituted with strings of one
+ or more characters. It is useful mainly for replacing
+ multiple “special” characters or symbols in the same target
+ content. It uses the value of
+ <parameter>map.contents</parameter> to do substitution on
+ <parameter>content</parameter>, and then returns the
+ modified contents.</para>
+ <note>
+ <para>This template is a very slightly modified version of
+ Jeni Tennison’s <function>replace_strings</function>
+ template in the <link
+ xlink:href="http://www.dpawson.co.uk/xsl/sect2/StringReplace.html#d9351e13"
+ >multiple string replacements</link> section of Dave Pawson’s
+ <link xlink:href="http://www.dpawson.co.uk/xsl/index.html"
+ >XSLT FAQ</link>.</para>
+ <para>The <function>apply-string-subst-map</function>
+ template is essentially the same template as the
+ <function>apply-character-map</function> template; the
+ only difference is that in the map that
+ <function>apply-string-subst-map</function> expects, <tag
+ class="attribute">oldstring</tag> and <tag
+ class="attribute">newstring</tag> attributes are used
+ instead of <tag class="attribute">character</tag> and <tag
+ class="attribute">string</tag> attributes.</para>
+ </note>
+ </refdescription>
+ <refparameter id="apply-character-map-params">
+ <variablelist>
+ <varlistentry><term>content</term>
+ <listitem>
+ <para>The content on which to perform the character-map
+ substitution.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>map.contents</term>
+ <listitem>
+ <para>A node set of elements, with each element having
+ the following attributes:
+ <itemizedlist>
+ <listitem>
+ <simpara><tag class="attribute">character</tag>, a
+ character to be replaced</simpara>
+ </listitem>
+ <listitem>
+ <simpara><tag class="attribute">string</tag>, a
+ string with which to replace <tag
+ class="attribute">character</tag></simpara>
+ </listitem>
+ </itemizedlist>
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refparameter>
+</doc:template>
+<xsl:template name="apply-character-map">
+ <xsl:param name="content"/>
+ <xsl:param name="map.contents"/>
+ <xsl:variable name="replaced_text">
+ <xsl:call-template name="string.subst">
+ <xsl:with-param name="string" select="$content" />
+ <xsl:with-param name="target"
+ select="$map.contents[1]/@character" />
+ <xsl:with-param name="replacement"
+ select="$map.contents[1]/@string" />
+ </xsl:call-template>
+ </xsl:variable>
+ <xsl:choose>
+ <xsl:when test="$map.contents[2]">
+ <xsl:call-template name="apply-character-map">
+ <xsl:with-param name="content" select="$replaced_text" />
+ <xsl:with-param name="map.contents"
+ select="$map.contents[position() > 1]" />
+ </xsl:call-template>
+ </xsl:when>
+ <xsl:otherwise>
+ <xsl:value-of select="$replaced_text" />
+ </xsl:otherwise>
+ </xsl:choose>
+</xsl:template>
+
+<!-- ===================================== -->
+<doc:template name="read-character-map" xmlns="">
+ <refpurpose>Reads in all or part of an XSLT character map</refpurpose>
+ <refdescription id="read-character-map-desc">
+ <para>The XSLT 2.0 specification describes <link
+ xlink:href="http://www.w3.org/TR/xslt20/#character-maps"
+ >character maps</link> and explains how they may be used
+ to allow a specific character appearing in a text or
+ attribute node in a final result tree to be substituted by
+ a specified string of characters during serialization. The
+ <function>read-character-map</function> template provides a
+ means for reading and using character maps with XSLT
+ 1.0-based tools.</para>
+ <para>This template reads the character-map contents from
+ <parameter>uri</parameter> (in full or in part, depending on
+ the value of the <parameter>use.subset</parameter>
+ parameter), then passes those contents to the
+ <function>apply-character-map</function> template, along with
+ <parameter>content</parameter>, the data on which to perform
+ the character substitution.</para>
+ <para>Using the character map “in part” means that it uses only
+ those <tag>output-character</tag> elements that match the
+ XPath expression given in the value of the
+ <parameter>subset.profile</parameter> parameter. The current
+ implementation of that capability here relies on the
+ <function>evaluate</function> extension XSLT function.</para>
+ </refdescription>
+ <refparameter id="read-character-map-params">
+ <variablelist>
+ <varlistentry><term>use.subset</term>
+ <listitem>
+ <para>Specifies whether to use a subset of the character
+ map instead of the whole map; boolean
+ <literal>0</literal> or <literal>1</literal></para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>subset.profile</term>
+ <listitem>
+ <para>XPath expression that specifies what subset of the
+ character map to use</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>uri</term>
+ <listitem>
+ <para>URI for a character map</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refparameter>
+</doc:template>
+<xsl:template name="read-character-map">
+ <xsl:param name="use.subset"/>
+ <xsl:param name="subset.profile"/>
+ <xsl:param name="uri"/>
+ <xsl:choose>
+ <xsl:when test="$use.subset != 0">
+ <!-- *use a subset of the character map instead of the full map -->
+ <xsl:choose>
+ <!-- * xsltproc and Xalan both support dyn:evaluate() -->
+ <xsl:when test="function-available('dyn:evaluate')">
+ <xsl:copy-of select="document($uri)//*[local-name()='output-character']
+ [dyn:evaluate($subset.profile)]"/>
+ </xsl:when>
+ <!-- * Saxon has its own evaluate() and doesn't support dyn:evaluate() -->
+ <xsl:when test="function-available('saxon:evaluate')">
+ <xsl:copy-of select="document($uri)//*[local-name()='output-character']
+ [saxon:evaluate($subset.profile)]"/>
+ </xsl:when>
+ <xsl:otherwise>
+ <xsl:message terminate="yes"
+>
+Error: To process character-map subsets, you must use an XSLT engine
+that supports the evaluate() XSLT extension function. Your XSLT engine
+does not support it.
+ </xsl:message>
+ </xsl:otherwise>
+ </xsl:choose>
+ </xsl:when>
+ <xsl:otherwise>
+ <!-- *value of $use.subset is non-zero, so use the full map -->
+ <xsl:copy-of select="document($uri)//*[local-name()='output-character']"/>
+ </xsl:otherwise>
+ </xsl:choose>
+</xsl:template>
+
+</xsl:stylesheet>