fn: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?

Namespace

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

Links to W3C specifications

XPath 2.0 Functions and Operators

XPath 3.0 Functions and Operators