- sxml:ns-uri->id obj uriprocedure
Returns the namespace id for the (first) namespace matching the given uri, or #f if no namespace matches the given uri.
(sxml:ns-uri->id '(c:part (@) (@@ (*NAMESPACES* (c "http://www.cars.com/xml") (d "http://www.cars.com/xml")))) "http://www.cars.com/xml") => c