The Data Complexity of Ontology-Mediated Queries with Closed Predicates.
Carsten LutzInanç SeylanFrank WolterPublished in: Log. Methods Comput. Sci. (2019)
Keyphrases
- data complexity
- query evaluation
- combined complexity
- query complexity
- expressive power
- conjunctive queries
- query language
- query answering
- datalog programs
- query processing
- unions of conjunctive queries
- regular path queries
- probabilistic databases
- query containment
- lower complexity
- query rewriting
- exptime complete
- aggregate functions
- query answers
- transitive closure
- knowledge representation
- answering queries
- data management
- np complete
- knowledge base
- integrity constraints
- monadic second order logic
- xml data
- ontology languages
- aggregate queries
- special case
- schema mappings
- semantic web
- data exchange
- domain ontology
- relational queries
- xpath queries
- database queries
- exact learning
- relational algebra
- data model