Node-Set Functions

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

count	Returns the number of nodes in the node-set argument.
id	Selects elements by their unique ID.
last	Returns a number equal to context size of the expression evaluation context.
local-name	Returns the local part of the expanded name of the node in the node-set argument that is first in document order.
name	Returns a string containing a QName representing the expanded name of the node in the node-set argument that is first in document order.
namespace-uri	Returns the namespace Uniform Resource Identifier (URI) of the expanded name of the node in the node-set argument that is first in document order.
position	Returns the index number of the node within the parent.