Keyphrases
- data exchange
- query answering
- data integration
- schema mappings
- data management
- databases
- dl lite
- ontology languages
- semantic web
- conjunctive queries
- knowledge base
- knowledge representation
- data complexity
- domain ontology
- xml schema
- data sets
- answering queries
- owl ontologies
- ontology mapping
- database
- data model
- digital campus
- xml data exchange