Keyphrases
- semantic query
- response time
- query processing
- database
- query evaluation
- background knowledge
- query expansion
- query formulation
- semantic web
- data structure
- knowledge base
- relevance feedback
- information integration
- data sources
- answering queries
- user queries
- semantic relations
- ontology mapping
- range queries
- logical implication
- complex queries
- query rewriting
- semantically related
- dl lite
- abductive reasoning
- database queries
- belief revision
- integrity constraints
- domain ontology
- retrieval systems
- semantic information
- user interaction
- domain specific
- knowledge representation
- domain knowledge