EXPLOITATION OF ONTOLOGY LANGUAGES FOR BOTH PERSISTENCE AND REASONING PURPOSES - Mapping PLIB, OWL and Flight Ontology Models Topics: Databases and Datawarehouses; Knowledge Management; Metadata and Metamodeling; Ontology and the Semantic Web In Proceedings of the Third International Conference on Web Information Systems and Technologies - Volume 1: WEBIST, 254-262, 2007 , Barcelona, Spain