Keyphrases
- query language
- conceptual model
- data model
- object oriented
- expressive power
- relational algebra
- query evaluation
- database
- recursive queries
- transitive closure
- regular expressions
- xml data
- real time
- conceptual structures
- knowledge structures
- topic maps
- computer vision
- query optimization
- conjunctive queries
- knowledge representation
- video sequences
- database systems
- knowledge base
- query interface
- information systems
- entity relationship
- data sets