Keyphrases
- query answering
- bitmap indexes
- answering queries
- query rewriting
- data integration
- storage space
- data exchange
- times faster
- query processing
- scientific data
- data structure
- rdf data
- data complexity
- data model
- conjunctive queries
- compression scheme
- index structure
- incomplete information
- semantic web
- query optimization
- integrity constraints
- data management
- query language
- databases
- range queries
- b tree
- response time
- image compression
- datalog programs
- query containment
- management system
- r tree
- query evaluation
- relational databases
- rdf graphs
- database design