Query and Predicate Emptiness in Ontology-Based Data Access.
Franz BaaderMeghyn BienvenuCarsten LutzFrank WolterPublished in: J. Artif. Intell. Res. (2016)
Keyphrases
- ontology based data access
- query processing
- database
- query answering
- query rewriting
- response time
- user queries
- first order logic
- data sources
- data structure
- description logics
- relevance feedback
- query expansion
- answering queries
- query optimization
- xpath queries
- query evaluation
- complex queries
- incomplete information
- database queries
- search engine
- knowledge base
- deep web
- data exchange
- integrity constraints
- data model
- data integration
- semantic web
- information retrieval systems