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net.sf.saxon.xpath
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<H2>
Package net.sf.saxon.xpath
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This package is Saxon's implementation of the JAXP API designed for executing XPath 1.0 expressions
directly from a Java application.
<P>
<B>See:</B>
<BR>
<A HREF="#package_description"><B>Description</B></A>
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<B>Class Summary</B></FONT></TH>
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<TD WIDTH="15%"><B><A HREF="../../../../net/sf/saxon/xpath/JAXPVariable.html" title="class in net.sf.saxon.xpath">JAXPVariable</A></B></TD>
<TD>An object representing an XPath variable for use in the JAXP XPath API.</TD>
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<TD WIDTH="15%"><B><A HREF="../../../../net/sf/saxon/xpath/JAXPXPathStaticContext.html" title="class in net.sf.saxon.xpath">JAXPXPathStaticContext</A></B></TD>
<TD>A JAXPXPathStaticContext provides a context for parsing an XPath expression
in a context other than a stylesheet.</TD>
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<TD WIDTH="15%"><B><A HREF="../../../../net/sf/saxon/xpath/XPathEvaluator.html" title="class in net.sf.saxon.xpath">XPathEvaluator</A></B></TD>
<TD>XPathEvaluator implements the JAXP API for standalone XPath processing (that is,
executing XPath expressions in the absence of an XSLT stylesheet).</TD>
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<TD WIDTH="15%"><B><A HREF="../../../../net/sf/saxon/xpath/XPathExpressionImpl.html" title="class in net.sf.saxon.xpath">XPathExpressionImpl</A></B></TD>
<TD>The JAXP XPathExpression interface represents a compiled XPath expression that can be repeatedly
evaluated.</TD>
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<TD WIDTH="15%"><B><A HREF="../../../../net/sf/saxon/xpath/XPathFactoryImpl.html" title="class in net.sf.saxon.xpath">XPathFactoryImpl</A></B></TD>
<TD>Saxon implementation of the JAXP 1.3 XPathFactory</TD>
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<TD WIDTH="15%"><B><A HREF="../../../../net/sf/saxon/xpath/XPathFunctionCall.html" title="class in net.sf.saxon.xpath">XPathFunctionCall</A></B></TD>
<TD>This class is an expression that calls an external function supplied using the
JAXP XPathFunction interface</TD>
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<TD WIDTH="15%"><B><A HREF="../../../../net/sf/saxon/xpath/XPathFunctionLibrary.html" title="class in net.sf.saxon.xpath">XPathFunctionLibrary</A></B></TD>
<TD>The XPathFunctionLibrary is a FunctionLibrary that supports binding of XPath function
calls to instances of the JAXP XPathFunction interface returned by an XPathFunctionResolver.</TD>
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<P>
<A NAME="package_description"><!-- --></A><H2>
Package net.sf.saxon.xpath Description
</H2>
<P>
<p>This package is Saxon's implementation of the JAXP API designed for executing XPath 1.0 expressions
directly from a Java application. Saxon extends the interface to handle XPath 2.0, though if the application
makes extensive use of XPath 2.0 features, then the <b>s9api</b> interface offers a better fit
to the XPath 2.0 data model. The API can be used either in a free-standing
Java application (that is, where there is no XSLT stylesheet), or it can be
used from within Java extension functions called from XPath expressions within
a stylesheet.</p>
<p>The API itself is defined by JAXP 1.3, in interfaces such as <code>javax.xml.xpath.XPath</code>.<
These interfaces are included in Java Standard Edition from JDK 1.5 onwards.</p>
<p>The interfaces provided by Saxon extend the JAXP 1.3 interfaces in various ways. There
are three reasons for this:</p>
<ul>
<li><p>Saxon supports XPath 2.0 rather than 1.0</p></li>
<li><p>The package retains support for some interfaces that were provided before JAXP 1.3 was released.
(These might disappear in the course of time).</p></li>
<li><p>There are methods that allow an escape into Saxon's more low-level APIs, needed by
anyone doing serious software integration.</p></li>
</ul>
<p>An alternative XPath interface, which is not dependent on JAXP 1.3, is available in the
package <code>net.sf.saxon.sxpath</code>. However, for most applications the preferred interface is
the s9api <A HREF="../../../../net/sf/saxon/s9api/XPathCompiler.html" title="class in net.sf.saxon.s9api"><CODE>XPathCompiler</CODE></A></p>
<p align="center"><i>Michael H. Kay<br/>
Saxonica Limited<br/>
30 July 2010</i></p>
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