key()

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The key() function finds nodes in which a named key has a given value. It is used with the <xsl:key> element.

Syntax:

node-set key(string, value) 

Arguments:

The name of the key and the value to be matched. If the value is not a node-set, it is converted into a string using the rules for the string() function. If the argument is a node-set, the key() is applied to the string value produced when each node in the node-set is converted into a string.

Result:

A node-set, containing all matching nodes from the same document as the context node.

Defined: XSLT, section 12.2.

NS support: Supported.