Keyphrases
- schema mappings
- conjunctive queries
- data exchange
- data integration
- query answering
- database schema
- data complexity
- query containment
- schema evolution
- regular path queries
- xml schema
- xml data exchange
- query evaluation
- decision procedures
- high level declarative
- high level specifications
- data model
- query rewriting
- databases
- data sets
- data management
- object oriented
- answering queries
- knowledge base
- finite sets