Extracts the prefix component of a QName value. Returns an empty sequence if the QName has no prefix.
prefix-from-QName($arg as xs:QName?) → xs:NCName?
Arguments |
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$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
Notes on the Saxon implementation
The function is fully implemented according to the W3C specifications.