XSLT Functions

The XML Path Language (XPath) syntax supports functions to provide information about nodes in a collection. These functions return strings or numbers and can be used with comparison operators in filter patterns. These functions are not available from the selectNodes method in the Document Object Model (DOM).

XSLT Functions

current	Returns a node set that has the current node as its only member.
document	Provides a way to retrieve other XML resources from within the XSLT style sheet beyond the initial data provided by the input stream.
element-available	Returns True if and only if the expanded-name is the name of an instruction.
format-number	Converts the first argument to a string using the format pattern string specified by the second argument.
function-available	Returns True if the function is available in the function library.
generate-id	Returns a string that uniquely identifies the node in the node-set argument that is first in document order.
key	Retrieves elements previously marked with an `<xsl:key>` statement.
node-set	Converts a tree into a node set. The resulting node always contains a single node and the root node of the tree.
system-property	Returns an object representing the value of the system property identified by the name.
unparsed-entity-uri	Returns declarations of unparsed entities in the document type definition (DTD) of the source document.

The following are node tests, not functions:

text()
processing-instruction()
comment()
node()

For more information, see Node Tests.