map:contains

Tests whether a particular key is present in a map. Returns true if the candidate key is present in the map, otherwise false.

contains($map as map(*), $key as xs:anyAtomicType) ➔ xs:boolean

Arguments
	$map	map(*)	The input map
	$key	xs:anyAtomicType	The candidate key
Result		xs:boolean

Namespace

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

Links to W3C specifications

XPath 3.1 Functions and Operators

XSLT 3.0 Specification

Notes on the Saxon implementation

Available as defined in XSLT 3.0 since Saxon 9.4; in XSLT, XPath, and XQuery, whether or not 3.0 is available.

XPath 3.1 version implemented since Saxon 9.7.

Saxon always compares string-valued keys using the Unicode codepoint collation.