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 <h2>Extensions for XSLTC</h2>
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 <a href="#intro">Introduction</a>
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 <a href="#constraints">Constraints</a>
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 <a href="#java_ext">Java extension</a>
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 <a href="#exslt_ext">EXSLT extensions</a>
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 <a name="intro">‌</a>
   <p align="right" size="2">
 <a href="#content">(top)</a>
 </p>
 <h3>Introduction</h3>
   <p>XSLTC supports the use of extension functions implemented in external Java classes. It also
   supports the <a href="#nodeset_ext">nodeset</a>, <a href="#redirect_ext">output/redirect</a>
   and <a href="#exslt_ext">EXSLT</a> extension functions. Extension support in XSLTC is
   still under development. It is currently not as complete as the extension support in the
   Xalan-Java Interpretive processor. There are constraints in some areas.</p>


 <a name="constraints">‌</a>
   <p align="right" size="2">
 <a href="#content">(top)</a>
 </p>
 <h3>Constraints</h3>
   <p>In addition to the constraints listed below for each particular extension, extension support
   in XSLTC also has the following limitations:</p>
   <ol>
   <li>
 <a href="extensions.html#ext-elements">Extension element</a> is not supported.
   The extension element mechanism is closely related to the internal implementation of the XSLT processor.
   The current extension element mechansim is designed for the Xalan-Java Interpretive processor. It does not work with XSLTC.</li>
   <li>The <a href="extensions.html#supported-lang">xalan:component and xalan:script</a> extension elements are not supported at the moment. This has
   the implication that you cannot use scripting languages (e.g. javascript) with XSLTC.</li>
   <li>
 <a href="extensionslib.html#sql">The SQL extension</a> is not supported in XSLTC at the moment.</li>
   </ol>


 <a name="java_ext">‌</a>
   <p align="right" size="2">
 <a href="#content">(top)</a>
 </p>
 <h3>Java extension</h3>
   <p>Java extension is supported in XSLTC. Constructors, static and instance methods are all supported.
   You can use any of the <a href="extensions.html#ext-func-calls">three namespace formats</a>
    (Java, package and class) in your stylesheet.
   </p>
   <p>The official namespace for the Java extension is <code>http://xml.apache.org/xalan/java</code>. The old XSLTC Java namespace
   <code>http://xml.apache.org/xalan/xsltc/java</code> and the old Xalan-Java namespace <code>http://xml.apache.org/xslt/java</code>
   are also supported for backward compatibility.</p>
   <p>All usage syntax for the Xalan-Java Interpretive processor also applies to XSLTC with only one
   exception: XSLTC does not support the notion of default object
   in <a href="extensions.html#ext-func-calls">class format namespace</a>.
   When using instance methods, you should always specify the class instance as the first argument
   to the extension function.</p>
   <p>The following example shows you how to call constructors, static, and nonstatic functions,
   using different namespace formats:</p>

   <blockquote class="source">
 <pre>&lt;xsl:stylesheet version="1.0"
     xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
     xmlns:date="http://xml.apache.org/xalan/java/java.util.Date"
     xmlns:java_lang="http://xml.apache.org/xalan/java/java.lang"
     exclude-result-prefixes="date java_lang"&gt;

   &lt;!--
   * test: construction of Date object using a parameter calculated
   *       by a static call to the java.lang.Math object. Then call
   *       a non-static method (getTime()) on the newly created Date
   *       object. Demonstrates calling constructors, static functions
   *       (Math.max) and non-static functions (getTime()).
   *
   * Output:
   *   &lt;?xml version="1.0" encoding="UTF-8"?&gt;
   *     Date of object: Sat Nov 30 17:32:41 EST 2002
   *     Time of object: 1038695561000
   *
   --&gt;

   &lt;xsl:template match="/"&gt;
    &lt;!-- create Date object with calculated parameter --&gt;
    &lt;xsl:variable name="dateObject"
      select="date:new(
          java_lang:Math.max(1027695561000,1038695561000)
      )"/&gt;
    Date of object: &lt;xsl:value-of select="$dateObject"/&gt;
    Time of object: &lt;xsl:value-of select="date:getTime($dateObject)"/&gt;
   &lt;/xsl:template&gt;

   &lt;/xsl:stylesheet&gt;
   </pre>
 </blockquote>
   <table class="note">
 <tr>
 <td class="noteImg">
 <img src="resources/note.gif" alt="note" />
 </td>
 <td class="noteTxt">Always use the abbreviated syntax for Java extension, because the xalan:component/xalan:script
   constructs are not supported in XSLTC.</td>
 </tr>
 </table>


 <a name="exslt_ext">‌</a>
   <p align="right" size="2">
 <a href="#content">(top)</a>
 </p>
 <h3>EXSLT extensions</h3>
   <p>The following EXSLT extension modules are supported in XSLTC:</p>
   <ul>
   <li>
 <a href="apidocs/org/apache/xalan/lib/ExsltCommon.html">EXSLT common functions</a>
 </li>
   <li>
 <a href="apidocs/org/apache/xalan/lib/ExsltMath.html">EXSLT math functions</a>
 </li>
   <li>
 <a href="apidocs/org/apache/xalan/lib/ExsltSets.html">EXSLT set functions</a>
 </li>
   <li>
 <a href="apidocs/org/apache/xalan/lib/ExsltDatetime.html">EXSLT date-and-time functions</a>
 </li>
   <li>
 <a href="apidocs/org/apache/xalan/lib/ExsltStrings.html">EXSLT string functions</a>
 </li>
   </ul>
   <p>The functions in the <a href="apidocs/org/apache/xalan/lib/ExsltDynamic.html">dynamic</a> module
   (e.g. evaluate) are not supported because of the XSLTC design limitation.
   Work is currently underway on <a href="http://www.exslt.org/func/elements/function/index.html">user
   defined EXSLT functions (with the function and result elements)</a>.</p>
   <p>The <code>nodeset</code> and <code>objectType</code> extension functions in the <a href="apidocs/org/apache/xalan/lib/ExsltCommon.html">common</a>
   module are implemented natively in XSLTC. For all other EXSLT extension functions,
   XSLTC uses the same implementation as the Xalan-Java Interpretive processor. The implementation classes
   are under <code>org.apache.xalan.lib</code>.
   Depending on the packaging, these classes can be in a separate jar file (e.g. xalan.jar) from
   the XSLTC classes. In this case you need to add the jar file containing the EXSLT classes to your
   classpath in order to use EXSLT extensions in XSLTC.</p>


 <a name="nodeset_ext">‌</a>
   <p align="right" size="2">
 <a href="#content">(top)</a>
 </p>
 <h3>nodeset</h3>
   <p>XSLTC also supports the nodeset() extension function for transforming an RTF (result
     tree fragment) into a node set.</p>
     <p>The nodeset extension can be used as an XSLTC extension function in the namespace
     <code>http://xml.apache.org/xalan/xsltc</code>, a Xalan-Java extension function in the namespace
     <code>http://xml.apache.org/xalan</code>, an EXSLT extension function in the namespace
     <code>http://exslt.org/common</code> or as a standard XPATH function. When it is used as
     an EXSLT extension function, you need to refer to the nodeset extension function as
     <code>node-set</code>.</p>
     <p>The following exmaple shows you how to use the nodeset extension
     function in different namespaces:</p>
     <blockquote class="source">
 <pre>&lt;xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
   xmlns:xsltc-extension="http://xml.apache.org/xalan/xsltc"
   xmlns:xalan="http://xml.apache.org/xalan"
   xmlns:exslt="http://exslt.org/common"
   version="1.0"&gt;
   &lt;xsl:template match="/"&gt;
     &lt;xsl:variable name="rtf"&gt;
       &lt;docelem&gt;
         &lt;elem1&gt;elem1&lt;/elem1&gt;
         &lt;elem2&gt;elem2&lt;/elem2&gt;
       &lt;/docelem&gt;
     &lt;/xsl:variable&gt;
     &lt;!-- Use nodeset as an XSLTC extension function --&gt;
     &lt;xsl:value-of select="xsltc-extension:nodeset($rtf)/docelem/elem1"/&gt;
     &lt;!-- Use nodeset as a Xalan-Java extension function --&gt;
     &lt;xsl:value-of select="xalan:nodeset($rtf)/docelem/elem1"/&gt;
     &lt;!-- Use nodeset as an EXSLT extension function --&gt;
     &lt;xsl:value-of select="exslt:node-set($rtf)/docelem/elem1"/&gt;
     &lt;!-- Use nodeset as standard function --&gt;
     &lt;xsl:value-of select="nodeset($rtf)/docelem/elem1"/&gt;
   &lt;/xsl:template&gt;
 &lt;/xsl:stylesheet&gt;
 </pre>
 </blockquote>
 <br />
 <table class="note">
 <tr>
 <td class="noteImg">
 <img src="resources/note.gif" alt="note" />
 </td>
 <td class="noteTxt">The preferred solution is to use the EXSLT node-set function so that it can work
 with multiple XSLT processors.</td>
 </tr>
 </table>


 <a name="redirect_ext">‌</a>
   <p align="right" size="2">
 <a href="#content">(top)</a>
 </p>
 <h3>output/redirect</h3>
   <p>XSLTC supports the output extension element for redirecting the output to one
   or more files. The output extension element is also aliased to the write extension element
   in the namespace <code>http://xml.apache.org/xalan/redirect</code>. Therefore you can use
   it in the same way as the <a href="extensionslib.html#redirect">redirect</a>
   extension in Xalan-Java.</p>
   <p>You can use the file and append attributes with the output/redirect extension. The value of the file
   attribute is an attribute value template. If the value of the append attribute is true or yes, the
   output is appended to the file rather than overwriting the file.</p>
   <p>The following example shows you how to use the output/redirect extension:</p>
     <blockquote class="source">
 <pre> &lt;xsl:stylesheet
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xsltc="http://xml.apache.org/xalan/xsltc"
    xmlns:redirect="http://xml.apache.org/xalan/redirect"
    extension-element-prefixes="xsltc redirect"
    version="1.0"&gt;
    &lt;xsl:template match="/"&gt;
      &lt;xsl:text&gt;This goes to standard output&lt;/xsl:text&gt;
      &lt;xsltc:output file="blob.xml"&gt;
        &lt;xsl:text&gt;This ends up in the file 'blob.xml'&lt;/xsl:text&gt;
      &lt;/xsltc:output&gt;
      &lt;redirect:write file="blob2.xml"&gt;
        &lt;xsl:text&gt;This ends up in the file 'blob2.xml'&lt;/xsl:text&gt;
      &lt;/redirect:write&gt;
    &lt;/xsl:template&gt;
 &lt;/xsl:stylesheet&gt;</pre>
 </blockquote>


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	<div id="content">
	<h2>Extensions for XSLTC</h2>
	<ul>
	<li>
	<a href="#intro">Introduction</a>
	</li>
	<li>
	<a href="#constraints">Constraints</a>
	</li>
	<li>
	<a href="#java_ext">Java extension</a>
	</li>
	<li>
	<a href="#exslt_ext">EXSLT extensions</a>
	</li>
	<li>
	<a href="#nodeset_ext">nodeset</a>
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	<a href="#redirect_ext">output/redirect</a>
	</li>
	</ul>
	<a name="intro">‌</a>
	<p align="right" size="2">
	<a href="#content">(top)</a>
	</p>
	<h3>Introduction</h3>
	<p>XSLTC supports the use of extension functions implemented in external Java classes. It also
	supports the <a href="#nodeset_ext">nodeset</a>, <a href="#redirect_ext">output/redirect</a>
	and <a href="#exslt_ext">EXSLT</a> extension functions. Extension support in XSLTC is
	still under development. It is currently not as complete as the extension support in the
	Xalan-Java Interpretive processor. There are constraints in some areas.</p>


	<a name="constraints">‌</a>
	<p align="right" size="2">
	<a href="#content">(top)</a>
	</p>
	<h3>Constraints</h3>
	<p>In addition to the constraints listed below for each particular extension, extension support
	in XSLTC also has the following limitations:</p>
	<ol>
	<li>
	<a href="extensions.html#ext-elements">Extension element</a> is not supported.
	The extension element mechanism is closely related to the internal implementation of the XSLT processor.
	The current extension element mechansim is designed for the Xalan-Java Interpretive processor. It does not work with XSLTC.</li>
	<li>The <a href="extensions.html#supported-lang">xalan:component and xalan:script</a> extension elements are not supported at the moment. This has
	the implication that you cannot use scripting languages (e.g. javascript) with XSLTC.</li>
	<li>
	<a href="extensionslib.html#sql">The SQL extension</a> is not supported in XSLTC at the moment.</li>
	</ol>


	<a name="java_ext">‌</a>
	<p align="right" size="2">
	<a href="#content">(top)</a>
	</p>
	<h3>Java extension</h3>
	<p>Java extension is supported in XSLTC. Constructors, static and instance methods are all supported.
	You can use any of the <a href="extensions.html#ext-func-calls">three namespace formats</a>
	(Java, package and class) in your stylesheet.
	</p>
	<p>The official namespace for the Java extension is <code>http://xml.apache.org/xalan/java</code>. The old XSLTC Java namespace
	<code>http://xml.apache.org/xalan/xsltc/java</code> and the old Xalan-Java namespace <code>http://xml.apache.org/xslt/java</code>
	are also supported for backward compatibility.</p>
	<p>All usage syntax for the Xalan-Java Interpretive processor also applies to XSLTC with only one
	exception: XSLTC does not support the notion of default object
	in <a href="extensions.html#ext-func-calls">class format namespace</a>.
	When using instance methods, you should always specify the class instance as the first argument
	to the extension function.</p>
	<p>The following example shows you how to call constructors, static, and nonstatic functions,
	using different namespace formats:</p>

	<blockquote class="source">
	<pre><xsl:stylesheet version="1.0"
	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
	xmlns:date="http://xml.apache.org/xalan/java/java.util.Date"
	xmlns:java_lang="http://xml.apache.org/xalan/java/java.lang"
	exclude-result-prefixes="date java_lang">

	<!--
	* test: construction of Date object using a parameter calculated
	* by a static call to the java.lang.Math object. Then call
	* a non-static method (getTime()) on the newly created Date
	* object. Demonstrates calling constructors, static functions
	* (Math.max) and non-static functions (getTime()).
	*
	* Output:
	* <?xml version="1.0" encoding="UTF-8"?>
	* Date of object: Sat Nov 30 17:32:41 EST 2002
	* Time of object: 1038695561000
	*
	-->

	<xsl:template match="/">
	<!-- create Date object with calculated parameter -->
	<xsl:variable name="dateObject"
	select="date:new(
	java_lang:Math.max(1027695561000,1038695561000)
	)"/>
	Date of object: <xsl:value-of select="$dateObject"/>
	Time of object: <xsl:value-of select="date:getTime($dateObject)"/>
	</xsl:template>

	</xsl:stylesheet>
	</pre>
	</blockquote>
	<table class="note">
	<tr>
	<td class="noteImg">
	<img src="resources/note.gif" alt="note" />
	</td>
	<td class="noteTxt">Always use the abbreviated syntax for Java extension, because the xalan:component/xalan:script
	constructs are not supported in XSLTC.</td>
	</tr>
	</table>


	<a name="exslt_ext">‌</a>
	<p align="right" size="2">
	<a href="#content">(top)</a>
	</p>
	<h3>EXSLT extensions</h3>
	<p>The following EXSLT extension modules are supported in XSLTC:</p>
	<ul>
	<li>
	<a href="apidocs/org/apache/xalan/lib/ExsltCommon.html">EXSLT common functions</a>
	</li>
	<li>
	<a href="apidocs/org/apache/xalan/lib/ExsltMath.html">EXSLT math functions</a>
	</li>
	<li>
	<a href="apidocs/org/apache/xalan/lib/ExsltSets.html">EXSLT set functions</a>
	</li>
	<li>
	<a href="apidocs/org/apache/xalan/lib/ExsltDatetime.html">EXSLT date-and-time functions</a>
	</li>
	<li>
	<a href="apidocs/org/apache/xalan/lib/ExsltStrings.html">EXSLT string functions</a>
	</li>
	</ul>
	<p>The functions in the <a href="apidocs/org/apache/xalan/lib/ExsltDynamic.html">dynamic</a> module
	(e.g. evaluate) are not supported because of the XSLTC design limitation.
	Work is currently underway on <a href="http://www.exslt.org/func/elements/function/index.html">user
	defined EXSLT functions (with the function and result elements)</a>.</p>
	<p>The <code>nodeset</code> and <code>objectType</code> extension functions in the <a href="apidocs/org/apache/xalan/lib/ExsltCommon.html">common</a>
	module are implemented natively in XSLTC. For all other EXSLT extension functions,
	XSLTC uses the same implementation as the Xalan-Java Interpretive processor. The implementation classes
	are under <code>org.apache.xalan.lib</code>.
	Depending on the packaging, these classes can be in a separate jar file (e.g. xalan.jar) from
	the XSLTC classes. In this case you need to add the jar file containing the EXSLT classes to your
	classpath in order to use EXSLT extensions in XSLTC.</p>


	<a name="nodeset_ext">‌</a>
	<p align="right" size="2">
	<a href="#content">(top)</a>
	</p>
	<h3>nodeset</h3>
	<p>XSLTC also supports the nodeset() extension function for transforming an RTF (result
	tree fragment) into a node set.</p>
	<p>The nodeset extension can be used as an XSLTC extension function in the namespace
	<code>http://xml.apache.org/xalan/xsltc</code>, a Xalan-Java extension function in the namespace
	<code>http://xml.apache.org/xalan</code>, an EXSLT extension function in the namespace
	<code>http://exslt.org/common</code> or as a standard XPATH function. When it is used as
	an EXSLT extension function, you need to refer to the nodeset extension function as
	<code>node-set</code>.</p>
	<p>The following exmaple shows you how to use the nodeset extension
	function in different namespaces:</p>
	<blockquote class="source">
	<pre><xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
	xmlns:xsltc-extension="http://xml.apache.org/xalan/xsltc"
	xmlns:xalan="http://xml.apache.org/xalan"
	xmlns:exslt="http://exslt.org/common"
	version="1.0">
	<xsl:template match="/">
	<xsl:variable name="rtf">
	<docelem>
	<elem1>elem1</elem1>
	<elem2>elem2</elem2>
	</docelem>
	</xsl:variable>
	<!-- Use nodeset as an XSLTC extension function -->
	<xsl:value-of select="xsltc-extension:nodeset($rtf)/docelem/elem1"/>
	<!-- Use nodeset as a Xalan-Java extension function -->
	<xsl:value-of select="xalan:nodeset($rtf)/docelem/elem1"/>
	<!-- Use nodeset as an EXSLT extension function -->
	<xsl:value-of select="exslt:node-set($rtf)/docelem/elem1"/>
	<!-- Use nodeset as standard function -->
	<xsl:value-of select="nodeset($rtf)/docelem/elem1"/>
	</xsl:template>
	</xsl:stylesheet>
	</pre>
	</blockquote>
	<br />
	<table class="note">
	<tr>
	<td class="noteImg">
	<img src="resources/note.gif" alt="note" />
	</td>
	<td class="noteTxt">The preferred solution is to use the EXSLT node-set function so that it can work
	with multiple XSLT processors.</td>
	</tr>
	</table>


	<a name="redirect_ext">‌</a>
	<p align="right" size="2">
	<a href="#content">(top)</a>
	</p>
	<h3>output/redirect</h3>
	<p>XSLTC supports the output extension element for redirecting the output to one
	or more files. The output extension element is also aliased to the write extension element
	in the namespace <code>http://xml.apache.org/xalan/redirect</code>. Therefore you can use
	it in the same way as the <a href="extensionslib.html#redirect">redirect</a>
	extension in Xalan-Java.</p>
	<p>You can use the file and append attributes with the output/redirect extension. The value of the file
	attribute is an attribute value template. If the value of the append attribute is true or yes, the
	output is appended to the file rather than overwriting the file.</p>
	<p>The following example shows you how to use the output/redirect extension:</p>
	<blockquote class="source">
	<pre> <xsl:stylesheet
	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
	xmlns:xsltc="http://xml.apache.org/xalan/xsltc"
	xmlns:redirect="http://xml.apache.org/xalan/redirect"
	extension-element-prefixes="xsltc redirect"
	version="1.0">
	<xsl:template match="/">
	<xsl:text>This goes to standard output</xsl:text>
	<xsltc:output file="blob.xml">
	<xsl:text>This ends up in the file 'blob.xml'</xsl:text>
	</xsltc:output>
	<redirect:write file="blob2.xml">
	<xsl:text>This ends up in the file 'blob2.xml'</xsl:text>
	</redirect:write>
	</xsl:template>
	</xsl:stylesheet></pre>
	</blockquote>


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	</p>
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