This section describes extension functions built in to the Saxon product. For information on writing your own extension functions, see Writing extension functions (Java) or Writing extension functions (.NET).
Full details of all extension functions, along with functions in the core library, are found in the Function Library.
The extension functions in Saxon fall into three groups, described in the following subsections:
Saxon extension functions defined by Saxonica and provided in the Saxon namespace
EXSLT extensions defined by the EXSLT initiative, using namespaces in the
EXPath extensions defined by the EXPath initiative, using namespaces in the