2 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
3 xmlns:doc="http://nwalsh.com/xsl/documentation/1.0"
4 xmlns:dyn="http://exslt.org/dynamic"
5 xmlns:saxon="http://icl.com/saxon"
6 xmlns:xlink="http://www.w3.org/1999/xlink"
7 exclude-result-prefixes="doc dyn saxon"
10 <!-- ********************************************************************
11 $Id: charmap.xsl 7266 2007-08-22 11:58:42Z xmldoc $
12 ********************************************************************
14 This file is part of the XSL DocBook Stylesheet distribution.
15 See ../README or http://docbook.sf.net/release/xsl/current/ for
16 copyright and other information.
18 ******************************************************************** -->
19 <doc:reference xmlns="" xml:id="charmap">
21 <title>Common » Character-Map Template Reference</title>
22 <releaseinfo role="meta">
23 $Id: charmap.xsl 7266 2007-08-22 11:58:42Z xmldoc $
26 <!-- * yes, partintro is a valid child of a reference... -->
27 <partintro xml:id="partintro">
28 <title>Introduction</title>
29 <para>This is technical reference documentation for the
30 character-map templates in the DocBook XSL Stylesheets.</para>
32 <para>These templates are defined in a separate file from the set
33 of “common” templates because some of the common templates
34 reference DocBook XSL stylesheet parameters, requiring the
35 entire set of parameters to be imported/included in any
36 stylesheet that imports/includes the common templates.</para>
37 <para>The character-map templates don’t import or include
38 any DocBook XSL stylesheet parameters, so the
39 character-map templates can be used without importing the
40 whole set of parameters.</para>
42 <para>This is not intended to be user documentation. It is
43 provided for developers writing customization layers for the
48 <!-- ===================================== -->
49 <doc:template name="apply-character-map" xmlns="">
50 <refpurpose>Applies an XSLT character map</refpurpose>
51 <refdescription id="apply-character-map-desc">
52 <para>This template applies an <link
53 xlink:href="http://www.w3.org/TR/xslt20/#character-maps"
54 >XSLT character map</link>; that is, it causes certain
55 individual characters to be substituted with strings of one
56 or more characters. It is useful mainly for replacing
57 multiple “special” characters or symbols in the same target
58 content. It uses the value of
59 <parameter>map.contents</parameter> to do substitution on
60 <parameter>content</parameter>, and then returns the
61 modified contents.</para>
63 <para>This template is a very slightly modified version of
64 Jeni Tennison’s <function>replace_strings</function>
66 xlink:href="http://www.dpawson.co.uk/xsl/sect2/StringReplace.html#d9351e13"
67 >multiple string replacements</link> section of Dave Pawson’s
68 <link xlink:href="http://www.dpawson.co.uk/xsl/index.html"
69 >XSLT FAQ</link>.</para>
70 <para>The <function>apply-string-subst-map</function>
71 template is essentially the same template as the
72 <function>apply-character-map</function> template; the
73 only difference is that in the map that
74 <function>apply-string-subst-map</function> expects, <tag
75 class="attribute">oldstring</tag> and <tag
76 class="attribute">newstring</tag> attributes are used
77 instead of <tag class="attribute">character</tag> and <tag
78 class="attribute">string</tag> attributes.</para>
81 <refparameter id="apply-character-map-params">
83 <varlistentry><term>content</term>
85 <para>The content on which to perform the character-map
89 <varlistentry><term>map.contents</term>
91 <para>A node set of elements, with each element having
92 the following attributes:
95 <simpara><tag class="attribute">character</tag>, a
96 character to be replaced</simpara>
99 <simpara><tag class="attribute">string</tag>, a
100 string with which to replace <tag
101 class="attribute">character</tag></simpara>
110 <xsl:template name="apply-character-map">
111 <xsl:param name="content"/>
112 <xsl:param name="map.contents"/>
113 <xsl:variable name="replaced_text">
114 <xsl:call-template name="string.subst">
115 <xsl:with-param name="string" select="$content" />
116 <xsl:with-param name="target"
117 select="$map.contents[1]/@character" />
118 <xsl:with-param name="replacement"
119 select="$map.contents[1]/@string" />
123 <xsl:when test="$map.contents[2]">
124 <xsl:call-template name="apply-character-map">
125 <xsl:with-param name="content" select="$replaced_text" />
126 <xsl:with-param name="map.contents"
127 select="$map.contents[position() > 1]" />
131 <xsl:value-of select="$replaced_text" />
136 <!-- ===================================== -->
137 <doc:template name="read-character-map" xmlns="">
138 <refpurpose>Reads in all or part of an XSLT character map</refpurpose>
139 <refdescription id="read-character-map-desc">
140 <para>The XSLT 2.0 specification describes <link
141 xlink:href="http://www.w3.org/TR/xslt20/#character-maps"
142 >character maps</link> and explains how they may be used
143 to allow a specific character appearing in a text or
144 attribute node in a final result tree to be substituted by
145 a specified string of characters during serialization. The
146 <function>read-character-map</function> template provides a
147 means for reading and using character maps with XSLT
148 1.0-based tools.</para>
149 <para>This template reads the character-map contents from
150 <parameter>uri</parameter> (in full or in part, depending on
151 the value of the <parameter>use.subset</parameter>
152 parameter), then passes those contents to the
153 <function>apply-character-map</function> template, along with
154 <parameter>content</parameter>, the data on which to perform
155 the character substitution.</para>
156 <para>Using the character map “in part” means that it uses only
157 those <tag>output-character</tag> elements that match the
158 XPath expression given in the value of the
159 <parameter>subset.profile</parameter> parameter. The current
160 implementation of that capability here relies on the
161 <function>evaluate</function> extension XSLT function.</para>
163 <refparameter id="read-character-map-params">
165 <varlistentry><term>use.subset</term>
167 <para>Specifies whether to use a subset of the character
168 map instead of the whole map; boolean
169 <literal>0</literal> or <literal>1</literal></para>
172 <varlistentry><term>subset.profile</term>
174 <para>XPath expression that specifies what subset of the
175 character map to use</para>
178 <varlistentry><term>uri</term>
180 <para>URI for a character map</para>
186 <xsl:template name="read-character-map">
187 <xsl:param name="use.subset"/>
188 <xsl:param name="subset.profile"/>
189 <xsl:param name="uri"/>
191 <xsl:when test="$use.subset != 0">
192 <!-- *use a subset of the character map instead of the full map -->
194 <!-- * xsltproc and Xalan both support dyn:evaluate() -->
195 <xsl:when test="function-available('dyn:evaluate')">
196 <xsl:copy-of select="document($uri)//*[local-name()='output-character']
197 [dyn:evaluate($subset.profile)]"/>
199 <!-- * Saxon has its own evaluate() and doesn't support dyn:evaluate() -->
200 <xsl:when test="function-available('saxon:evaluate')">
201 <xsl:copy-of select="document($uri)//*[local-name()='output-character']
202 [saxon:evaluate($subset.profile)]"/>
205 <xsl:message terminate="yes"
207 Error: To process character-map subsets, you must use an XSLT engine
208 that supports the evaluate() XSLT extension function. Your XSLT engine
215 <!-- *value of $use.subset is non-zero, so use the full map -->
216 <xsl:copy-of select="document($uri)//*[local-name()='output-character']"/>