Functions Related to QNames - namespace-uri-from-QName

THIS TOPIC APPLIES TO: yesSQL Server (starting with 2012)noAzure SQL DatabasenoAzure SQL Data Warehouse noParallel Data Warehouse

Returns a string representing the namespace uri of the QName specified by $arg. The result is the empty sequence if $arg is the empty sequence.


namespace-uri-from-QName($arg as xs:QName?) as xs:string?  


Is the QName whose namespace URI is returned.


This topic provides XQuery examples against XML instances that are stored in various xml type columns in the AdventureWorks database.

A. Retrieve the namespace URI from a QName

For a working sample, see local-name-from-QName (XQuery).

Implementation Limitations

These are the limitations:

  • The namespace-uri-from-QName() function returns instances of xs:string instead of xs:anyURI.

See Also

Functions Related to QNames (XQuery)