key - XPath 编辑
XSLT/XPath Reference: XSLT elements, EXSLT functions, XPath functions, XPath axes
The key function returns a node-set of nodes that have the given value for the given key.
Syntax
key(keyname ,value )
Arguments
keyname- A string containing the name of the
xsl:keyelement to be used.
value- The returned node-set will contain every node that has this value for the given key.
Returns
A node set.
Notes
- The
xsl:keyelement defines what attribute on what given elements will be used to match the key.
This function is an XSLT-specific addition to XPath. It is not a part of the core XPath function library.
Defined
Gecko support
Supported.
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