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base-uri

The base-uri function in XQuery returns the base URI of the given node. The base URI is typically the URI against which relative URIs in the document should be resolved.

Syntax

fn:base-uri(arg)

The following table describes the argument for this command:

Argument	Required/Optional	Description
arg	Optional	The node for which to retrieve the base URI. If omitted or empty, the context item is used.

Return Value

Returns the base URI of the specified node as an

xs:anyURI

Returns an empty sequence if the base URI is not available.

Returns an error if no context item is available and no argument is provided.

Examples

The following table lists some sample values and return values:

SAMPLE FUNCTION	OUTPUT
fn:base-uri() (when context item is a node with base URI)	"http://example.com/doc.xml"
fn:base-uri(/root)	"http://example.com/doc.xml"
fn:base-uri(())	()
fn:base-uri() (with no context item)	Error