Query Languages for Data Exchange: Beyond Unions of Conjunctive Queries.
Marcelo ArenasPablo BarcelóJuan L. ReutterPublished in: Theory Comput. Syst. (2011)
Keyphrases
- unions of conjunctive queries
- data exchange
- conjunctive queries
- query language
- query answering
- data integration
- data model
- expressive power
- data management
- schema mappings
- relational algebra
- query evaluation
- transitive closure
- data complexity
- probabilistic databases
- regular path queries
- decision procedures
- query rewriting
- xml schema
- data sets
- xml queries
- database
- regular expressions
- complex objects
- integrity constraints
- xml data
- query containment
- object oriented
- datalog programs
- business intelligence