Ontology-Based Query Division and Reformulation for Heterogeneous Information Integration
Jian Li · Journal of Software · 2007
People can obtain information from heterogeneous data resources by semantic querying based on ontology. The difficult problem is how to reformulate a global query into multiple sub-queries over those local data bases. This paper presents a kind of uniform expression for queries of concept instances and a method in dividing the query expression into the local ones. All local query results can be integrated for the users' purposes. Using these methods to query integrated data resources, users can get right results they desire.