30. A non-transitory program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform steps for accessing and managing a relational database comprising: querying a relational database; and accessing semantically relevant query results from the relational database, said accessing step comprising: accessing at least one ontology; extracting domain knowledge from at least one ontology; and employing the domain knowledge in obtaining the semantically relevant query results from the relational database; wherein said semantically relevant query results comprise direct results obtained directly from relational database tables, inferred results inferred utilizing information explicitly listed in the relational database and the at least one ontology, and related results obtained utilizing data in the relational database tables and one or more definitions of similarity of concepts and individuals based on the at least one ontology; and wherein said accessing semantically relevant query results comprises: applying a query generalization strategy, the query generalization strategy comprising applying strategies to an original query to obtain a generalized level of queries comprising one or more general queries and repeatedly applying the strategies to the generalized level of queries until a prespecified number of results is obtained; and ranking results obtained through the query generalization strategy based on a number generalizations performed.
30. A non-transitory program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform steps for accessing and managing a relational database comprising: querying a relational database; and accessing semantically relevant query results from the relational database, said accessing step comprising: accessing at least one ontology; extracting domain knowledge from at least one ontology; and employing the domain knowledge in obtaining the semantically relevant query results from the relational database; wherein said semantically relevant query results comprise direct results obtained directly from relational database tables, inferred results inferred utilizing information explicitly listed in the relational database and the at least one ontology, and related results obtained utilizing data in the relational database tables and one or more definitions of similarity of concepts and individuals based on the at least one ontology; and wherein said accessing semantically relevant query results comprises: applying a query generalization strategy, the query generalization strategy comprising applying strategies to an original query to obtain a generalized level of queries comprising one or more general queries and repeatedly applying the strategies to the generalized level of queries until a prespecified number of results is obtained; and ranking results obtained through the query generalization strategy based on a number generalizations performed. 31. The non-transitory program storage device according to claim 30 , wherein said accessing semantically relevant query results comprises employing a description logic reasoner configured to obtain inferred results based on domain knowledge in the at least one ontology and data listed in the relational database, the description logic reasoner allowing for inferring query results not explicitly stated in the relational database.