Keyphrases
- metadata
- database
- query processing
- digital libraries
- heterogeneous databases
- response time
- user queries
- databases
- query expansion
- query evaluation
- application profiles
- multimedia documents
- relevance feedback
- range queries
- multimedia
- data structure
- retrieval systems
- database queries
- statistical information
- learning objects
- information retrieval
- database systems
- multi dimensional
- search queries
- software tools
- query formulation