@prefix rdf:	<http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix ns1:	<http://www.rdfabout.com/rdf/schema/ussec/> .
@prefix owl:	<http://www.w3.org/2002/07/owl#> .
ns1:tradingSymbol	rdf:type	owl:inverseFunctionalProperty .