SAXONICA

Saxon Documentation
Full Contents
About Saxon
Changes in this Release
Conditions of Use
Using XSLT 2.0
Using XQuery
Handling Source Documents
XML Schema Processing
The XPath API
Standards Conformance
Extensibility
Saxon Extensions
Sample Saxon Applications
The Saxon SQL Extension
XSLT Elements
XPath 2.0 Expression Syntax
| Introduction
| Constants
| Variable References
» | Function Calls
| Axis steps
| Parentheses and operator precedence
| Filter expressions
| Path expressions
| Cast as, Treat as
| Set difference and intersection
| Union
| Arithmetic expressions
| Range expressions
| Comparisons
| Instance of and Castable as
| Conditional Expressions
| Quantified Expressions
| For Expressions
| Boolean expressions: AND and OR
| Sequence expressions
Function Library
XSLT Patterns

# Function Calls

A function call in XPath 2.0 takes the form `F ( arg1, arg2, ...)` . 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 Functions section. Additional functions are available (in a special namespace) as Saxon extensions: these are listed in the Extensions. Further functions may be implemented by the user, either as XSLT stylesheet functions (see xsl:function), as XQuery functions, or as Java extension functions (see the Extensibility section).

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