Using XSLT Functions in XPath Expressions

The XPath specification defines many functions. XSLT style sheets have several additional functions available to them. These include:

Function	Description
document(obj, ns?)	Allows processing of more than one source document
key(str, obj)	Retrieves a key assigned by the `<xsl:key>` element
format-number(num, str, str?)	Formats a numeric value in any of a variety of ways
current()	Locates the current node in a node-set
unparsed-entity-uri(str)	Returns the URI of a specified unparsed entity
generate-id(ns?)	Assigns a unique identifier to the first node in a given node-set
system-property(str)	Returns the value of a specified system property, such as the name or version of the XSLT processor

For more information about these functions, including examples, see the following topics in the XSLT Reference: