Query language-based inverses of schema mappings: semantics, computation, and closure properties.
Marcelo ArenasJorge PérezJuan L. ReutterCristian RiverosPublished in: VLDB J. (2012)
Keyphrases
- schema mappings
- query language
- closure properties
- data exchange
- data integration
- conjunctive queries
- data model
- expressive power
- query answering
- database schema
- xml schema
- database
- query evaluation
- context free grammars
- data management
- xml queries
- data complexity
- xml data
- finite sets
- logical equivalence
- object oriented
- data sources
- database systems
- data sets