| Microsoft XML Core Services (MSXML) 5.0 for Microsoft Office - XSLT Developer's Guide |  |
XPath Functions and XSLT Functions
XSLT has a variety of predefined functions.
An expression in XSLT can include a function call.
A function returns a value.
See Also
Using Functions in XPath Expressions | Using the key() Function | XSLT Functions | XPath Functions