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QName

The QName function in XQuery constructs a QName (Qualified Name) from a namespace URI and a local part (local name). It is used to create a QName value dynamically in XQuery.

Syntax

fn:QName(paramURI, paramQName)

The following table describes the argument for this command:

Argument	Required/Optional	Description
paramURI	Optional	The namespace URI part of the QName. It can be empty or "" if no namespace is desired.
paramQName	Required	The local part or the local name of the QName. It must be a valid non-colonized name (NCName).

Return Value

Returns an

xs:QName

constructed from the provided namespace URI and local name.

Raises an error if the local name is not a valid NCName.

If the namespace URI is empty or

, the QName is in no namespace.

Examples

The following table lists some sample values and return values:

SAMPLE FUNCTION	OUTPUT
fn:QName("http://example.com/ns", "name")	QName("{http://example.com/ns}name")
fn:QName("", "name")	QName("name")
fn:QName((), "name")	QName("name")
fn:QName("http://example.com/ns", "1invalid")	Error