Keyphrases
- ontology languages
- description logics
- semantic web
- conceptual modeling
- data complexity
- data types
- formal semantics
- query answering
- conceptual models
- owl ontologies
- answering queries
- data model
- object oriented
- database
- artificial intelligence
- information technology
- computational complexity
- data structure
- conjunctive queries
- information integration
- case study
- knowledge base