Approximate Query Reformulation based on Hierarchical Ontology Mapping

This paper proposes an approximate query reformulation framework for integrating multiple ontologies. In order to achieve semantic interoperability in the Semantic Web, multiple ontologies have to be integrated. Ontology integration requires approximation mechanisms, since often no perfectly corresponding ontologies exist. However, most previous research efforts on ontology integration have not provided clear semantics for approximation. In this paper, we propose a formal framework for approximate query reformulation and provide a reformulation method based on hierarchical ontology mapping.