xalan-j/xsltc/xsl_lang_design.html (189 lines of code) (raw):
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>ASF: lang() function</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<meta http-equiv="Content-Style-Type" content="text/css" />
<link rel="stylesheet" type="text/css" href="resources/apache-xalan.css" />
</head>
<!--
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
-->
<body>
<div id="title">
<table class="HdrTitle">
<tbody>
<tr>
<th rowspan="2">
<a href="../index.html">
<img alt="Trademark Logo" src="resources/XalanJ-Logo-tm.png" width="190" height="90" />
</a>
</th>
<th text-align="center" width="75%">
<a href="index.html">XSLTC Design</a>
</th>
</tr>
<tr>
<td valign="middle">lang() function</td>
</tr>
</tbody>
</table>
<table class="HdrButtons" align="center" border="1">
<tbody>
<tr>
<td>
<a href="http://www.apache.org">Apache Foundation</a>
</td>
<td>
<a href="http://xalan.apache.org">Xalan Project</a>
</td>
<td>
<a href="http://xerces.apache.org">Xerces Project</a>
</td>
<td>
<a href="http://www.w3.org/TR">Web Consortium</a>
</td>
<td>
<a href="http://www.oasis-open.org/standards">Oasis Open</a>
</td>
</tr>
</tbody>
</table>
</div>
<div id="navLeft">
<ul>
<li>
<a href="index.html">Overview</a>
</li></ul><hr /><ul>
<li>
<a href="xsltc_compiler.html">Compiler design</a>
</li></ul><hr /><ul>
<li>
<a href="xsl_whitespace_design.html">Whitespace</a>
</li>
<li>
<a href="xsl_sort_design.html">xsl:sort</a>
</li>
<li>
<a href="xsl_key_design.html">Keys</a>
</li>
<li>
<a href="xsl_comment_design.html">Comment design</a>
</li></ul><hr /><ul>
<li>lang()<br />
</li>
<li>
<a href="xsl_unparsed_design.html">Unparsed entities</a>
</li></ul><hr /><ul>
<li>
<a href="xsl_if_design.html">If design</a>
</li>
<li>
<a href="xsl_choose_design.html">Choose|When|Otherwise design</a>
</li>
<li>
<a href="xsl_include_design.html">Include|Import design</a>
</li>
<li>
<a href="xsl_variable_design.html">Variable|Param design</a>
</li></ul><hr /><ul>
<li>
<a href="xsltc_runtime.html">Runtime</a>
</li></ul><hr /><ul>
<li>
<a href="xsltc_dom.html">Internal DOM</a>
</li>
<li>
<a href="xsltc_namespace.html">Namespaces</a>
</li></ul><hr /><ul>
<li>
<a href="xsltc_trax.html">Translet & TrAX</a>
</li>
<li>
<a href="xsltc_predicates.html">XPath Predicates</a>
</li>
<li>
<a href="xsltc_iterators.html">Xsltc Iterators</a>
</li>
<li>
<a href="xsltc_native_api.html">Xsltc Native API</a>
</li>
<li>
<a href="xsltc_trax_api.html">Xsltc TrAX API</a>
</li>
<li>
<a href="xsltc_performance.html">Performance Hints</a>
</li>
</ul>
</div>
<div id="content">
<h2>lang() function</h2>
<ul>
<li>
<a href="#functionality">Functionality</a>
</li>
<li>
<a href="#implementation">Implementation</a>
</li>
</ul>
<a name="functionality"></a>
<p align="right" size="2">
<a href="#content">(top)</a>
</p>
<h3>Functionality</h3>
<p>The <code>xml:lang</code> can be used to determine the language for a node or
a node-set. The attribute can be used to store language-specific data in an
XML document:</p>
<blockquote class="source">
<pre>
<phrases>
<greeting xml:lang="en">Hello!</greeting>
<greeting xml:lang="no">Hei!</greeting>
<greeting xml:lang="fr">Salut!</greeting>
<greeting xml:lang="es">Hola!</greeting>
<greeting xml:lang="de">Sweinhund!</greeting>
</phrases>
</pre>
</blockquote>
<p>The XSL stylesheet can use the <code>lang()</code> function to select the
element with the desired language:</p>
<blockquote class="source">
<pre>
<xsl:template match="greeting">
<xsl:if test="lang("de")>
<xsl:value-of select="."/>
<xsl:text> Grossglucklicher wunche!</xsl:text>
</xsl:if>
</xsl:template>
</pre>
</blockquote>
<a name="implementation"></a>
<p align="right" size="2">
<a href="#content">(top)</a>
</p>
<h3>Implementation</h3>
<p>The DOM interface has been given a method that returns the language for
a given node. The language is returned as a string (on whatever format is
used in the XML document - should be iso), and may be null if no language is
defined.</p>
<blockquote class="source">
<pre>
public String DOM.getLanguage(int node);
</pre>
</blockquote>
<p>The BasisLibrary class has a static method that will compare the language
of the context node with some other language and return the result as a
boolean.</p>
<blockquote class="source">
<pre>
public static boolean BasisLibrary.testLanguage(String language, DOM dom, int node);
</pre>
</blockquote>
<p>The compiled code for the <code>lang()</code> method calls this method in the
BasisLibrary and leaves the result on the stack for the calling element.</p>
<p align="right" size="2">
<a href="#content">(top)</a>
</p>
</div>
<div id="footer">Copyright © 1999-2014 The Apache Software Foundation<br />Apache, Xalan, and the Feather logo are trademarks of The Apache Software Foundation<div class="small">Web Page created on - Thu 2014-05-15</div>
</div>
</body>
</html>