XPath Node-Set Functions

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4/8/2010

Node-Set functions take a node-set argument, return a node set, or return/provide information about a particular node within a node set.

The following table shows the Node-Set functions implemented by XPath.

Function	Description
count Function	Returns the number of nodes in the node-set argument.
document Function	Provides a way to retrieve other XML resources from within the XSL Transformations (XSLT) style sheet beyond the initial data provided by the input stream.
id Function	Selects elements by their unique ID.
key Function	Retrieves elements previously marked with an xsl:key statement.
last Function	Returns a number equal to context size of the expression evaluation context.
local-name Function	Returns the local part of the expanded name of the node in the node-set argument that is first in document order.
name Function	Returns a string containing a Qualified Names representing the expanded name of the node in the node-set argument that is first in document order.
namespace-uri Function	Returns the name space Uniform Resource Identifier (URI) of the expanded name of the node in the node-set argument that is first in document order.
position Function	Returns the index number of the node within the parent.

See Also