prefix-from-QName

Extracts the prefix component of a QName value. Returns an empty sequence if the QName has no prefix.

prefix-from-QName($arg as xs:QName?) ➔ xs:NCName?

Arguments
	$arg	xs:QName?	The QName whose prefix component is required
Result		xs:NCName?

Links to W3C specifications

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

Applies to: XPath 2.0, XSLT 2.0, XQuery 1.0 and later versions

XPath 2.0 Functions and Operators

XPath 3.0 Functions and Operators

Notes on the Saxon implementation

The function is fully implemented according to the W3C specifications.