Parses the prefix declaration of a namespace URI and returns the pair (prefix, namespace URI)
Parses the prefix declaration of a namespace URI and returns the pair (prefix, namespace URI)
Sth like xmlns:="http://swat.cse.lehigh.edu/onto/univ-bench.owl#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
Trait to support the parsing of prefixes from expressions given in RFD/XML syntax.