xsl:key

---

The <xsl:key> element declares a named key which can be used elsewhere in the stylesheet with the key( ) function.

Syntax:

<xsl:key name=NAME match=EXPRESSION
	use=EXPRESSION /> 

Required Attributes:

name:

Specifies a name for this key. Must be a QName.

match:

Defines the nodes for which this key is applicable.

use:

Specifies an XPath expression that will be used to determine the value of the key for each of the applicable nodes.

Optional Attributes: None.

Type: Top-level, must be the child of <xsl:stylesheet> or <xsl:transform>.

Defined: XSLT, section 12.2.

NS support: Supported.