Returns the set of keys found in an input map, in arbitrary order.
keys($map as map(*)) ➔ xs:anyAtomicType*
The map whose keys are required
Links to W3C specifications
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.