Keyphrases
- query language
- data model
- expressive power
- database
- relational algebra
- query evaluation
- object oriented
- conjunctive queries
- artificial intelligence
- language constructs
- transitive closure
- structured documents
- regular expressions
- data model and query language
- conceptual model
- xml data
- knowledge discovery
- probabilistic model
- special case
- information technology
- case study
- image processing
- decision making
- databases