Querying Data Exchange Settings Beyond Positive Queries.
Marco CalauttiSergio GrecoCristian MolinaroIrina TrubitsynaPublished in: CoRR (2023)
Keyphrases
- data exchange
- query answering
- xml data exchange
- query language
- unions of conjunctive queries
- answering queries
- query processing
- data integration
- data integration systems
- data management
- schema mappings
- database
- query answers
- issues arise
- data sources
- conjunctive queries
- query rewriting
- open world
- tuple generating dependencies
- databases
- query evaluation
- data model
- xml queries
- database queries
- closed world
- query containment
- query interface
- regular path queries
- source schema
- relational queries
- probabilistic databases
- aggregate queries
- data complexity
- rdf data
- xml schema
- expressive power
- query optimization
- database systems
- case study
- complexity of query answering
- data sets