Ontology Mapping: Towards semantic interoperability in distributed and heterogeneous environments

Wednesday, November 5, 2008 - 17:30
TH 331
Dr. Ming Mao, SAP
The World Wide Web (WWW) now is widely used as a universal medium for information exchange. Semantic interoperability among different information systems in the WWW is limited due to information heterogeneity, and the non semantic nature of HTML and URLs. Ontologies have been suggested as a way to solve the problem of information heterogeneity by providing formal, explicit definitions of data and reasoning ability over related concepts. Given that no universal ontology exists for the WWW, work has focused on finding semantic correspondences between similar elements of different ontologies, i.e., ontology mapping. Ontology mapping can be done either by hand or using automated tools. Manual mapping becomes impractical as the size and complexity of ontologies increases. Full or semi-automated mapping approaches have been examined by several research studies. Previous mapping approaches include analyzing linguistic information of elements in ontologies, treating ontologies as structural graphs, applying heuristic rules and machine learning techniques, and using probabilistic and reasoning methods etc. In this talk, a generic ontology mapping approach, the PRIOR+, is proposed. the PRIOR+ approach utilizes both information retrieval and artificial intelligence techniques in the context of ontology mapping. The results of the PRIOR+ on different tests at OAEI ontology matching campaign 2007 are encouraging.

Dr. Ming Mao is a Research Scientist at SAP Research Americas, based on Palo Alto. She got her Ph.D from University of Pittsburgh. Her research interest includes Semantic Web technologies, and more specific, ontology engineering and ontology-based semantic information retrieval. Please contact her at ming.mao@sap.com.