<?xml version="1.0" encoding="iso-8859-1"?> <?xml-stylesheet href="../make-menu.xsl" type="text/xsl"?><html> <head> <this-is section="expressions" page="functioncalls" subpage=""/> <!-- Generated at 2011-12-09T20:47:22.916Z--><title>Saxonica: XSLT and XQuery Processing: Function Calls</title> <meta name="coverage" content="Worldwide"/> <meta name="copyright" content="Copyright Saxonica Ltd"/> <meta name="title" content="Saxonica: XSLT and XQuery Processing: Function Calls"/> <meta name="robots" content="noindex,nofollow"/> <link rel="stylesheet" href="../saxondocs.css" type="text/css"/> </head> <body class="main"> <h1>Function Calls</h1> <p>A function call in XPath 2.0 takes the form <code>F ( arg1, arg2, ...) </code>. In general, the function name is a QName. A library of core functions is defined in the XPath 2.0 and XSLT 2.0 specifications. For details of these functions, including notes on their implementation in this Saxon release, see the <a class="bodylink" href="../functions/intro.xml">Functions</a> section. Additional functions are available (in a special namespace) as Saxon extensions: these are listed in the <a class="bodylink" href="../extensions/intro.xml">Extensions</a>. Further functions may be implemented by the user, either as XSLT <i>stylesheet functions</i> (see <a class="bodylink" href="../xsl-elements/function.xml">xsl:function</a>), as XQuery functions, or as Java <i>extension functions</i> (see the <a class="bodylink" href="../extensibility/intro.xml">Extensibility</a> section).</p> <table width="100%"> <tr> <td> <p align="right"><a class="nav" href="axissteps.xml">Next</a></p> </td> </tr> </table> </body> </html>