Keyphrases
- visual query language
- query processing
- response time
- database
- programming language
- query evaluation
- natural language queries
- algebraic operations
- rewriting rules
- natural language
- query expansion
- user queries
- keywords
- relevance feedback
- data sources
- data structure
- high level query language
- query execution
- query formulation
- query language for xml
- query terms
- xml query languages
- complex queries
- database queries
- range queries
- query language
- database systems