Keyphrases
- owl ontologies
- semantic web
- rule language
- semantic web technologies
- owl dl
- description logics
- knowledge representation
- semantic web rule language
- knowledge base
- database
- response time
- query processing
- production rules
- ontology languages
- query expansion
- relevance feedback
- rdf data
- logic programming
- markup language
- reasoning systems
- domain ontology
- expert systems
- semantic annotation
- query evaluation
- business rules
- data structure
- database queries
- inference engine
- knowledge management
- data sources
- web services
- information retrieval
- database schema
- query optimization
- information retrieval systems
- reasoning problems