Ontological query answering under expressive Entity-Relationship schemata.
Andrea CalìGeorg GottlobAndreas PierisPublished in: Inf. Syst. (2012)
Keyphrases
- query answering
- entity relationship
- database schema
- integrity constraints
- conceptual modeling
- conceptual schema
- functional dependencies
- data exchange
- data integration
- schema mappings
- object oriented
- data complexity
- conjunctive queries
- data model
- database design
- relational model
- incomplete information
- owl ontologies
- answering queries
- relational databases
- domain ontology
- conceptual model
- database
- normal form
- conceptual models
- data modeling
- relational algebra
- data sets
- databases
- knowledge representation
- xml schema
- expert systems
- semi automatic
- complex objects
- data warehousing