<xsl:key> - XSLT: Extensible Stylesheet Language Transformations 编辑

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.

Gecko support

Supported.