Keyphrases
- query language
- conjunctive queries
- sql queries
- rewriting rules
- sparql queries
- data model
- query rewriting
- relational databases
- query engine
- expressive power
- relational model
- semantic web
- rdf data
- relational algebra
- query evaluation
- rewrite rules
- query language for rdf
- linked data
- data types
- database design
- object oriented
- database language
- relational database systems
- recursive queries
- relational dbms
- databases
- datalog programs
- database queries
- cd rom
- database
- query optimization
- queries using views
- relational calculus
- regular expressions
- rdf graphs
- database schema
- sql server
- database applications