map:keys

Returns the set of keys found in a map.

keys($map as map(*)) ➔ xs:anyAtomicType*

Arguments
	$map	map(*)	The map whose keys are required
Result		xs:anyAtomicType*

Details

Namespace: http://www.w3.org/2005/xpath-functions/map

Applies to: XSLT 3.0 only (if enabled in Saxon: requires Saxon-PE or Saxon-EE)

The function takes a map as input and returns the keys found in the map, in arbitrary order.

Notes on the Saxon implementation

Available since Saxon 9.4. Currently in namespace http://www.w3.org/2005/xpath-functions/map. Available in XSLT, XPath, and XQuery, whether or not 3.0 is available. Requires Saxon-PE or Saxon-EE.