Efficient Ontological Query Answering by Rewriting into Graph Queries.
Mirko Michele DimartinoAndrea CalìAlexandra PoulovassilisPeter T. WoodPublished in: FQAS (2019)
Keyphrases
- query answering
- query rewriting
- answering queries
- conjunctive queries
- regular path queries
- query answers
- query containment
- data exchange
- data complexity
- inconsistent databases
- query evaluation
- data integration
- unions of conjunctive queries
- query relaxation
- graph databases
- integrity constraints
- data integration systems
- probabilistic databases
- xml data exchange
- tuple generating dependencies
- datalog programs
- incomplete information
- query language
- database
- regular expressions
- query optimization
- dynamic environments
- ontology based data access
- query processing
- expressive power
- semistructured data
- complex queries
- structured data
- data model
- databases
- open world
- aggregate queries
- magic sets
- query plan