Query languages for data exchange: beyond unions of conjunctive queries.
Marcelo ArenasPablo BarcelóJuan L. ReutterPublished in: ICDT (2009)
Keyphrases
- unions of conjunctive queries
- data exchange
- query language
- conjunctive queries
- query answering
- data integration
- data model
- relational algebra
- expressive power
- schema mappings
- transitive closure
- data management
- data complexity
- query evaluation
- database
- xml schema
- query rewriting
- complex objects
- decision procedures
- probabilistic databases
- query containment
- regular expressions
- regular path queries
- databases
- xml queries
- object oriented
- database systems
- xml data
- data sources
- datalog programs
- logic programming