Keyphrases
- query processing
- inverted index
- user queries
- document images
- information retrieval
- database systems
- continuous query processing
- query optimization
- information retrieval systems
- document collections
- retrieval systems
- relevant documents
- web documents
- data management
- database query processing
- document retrieval
- inverted lists
- keywords
- document classification
- database
- xml data
- query execution
- r tree
- cost model
- vector space model
- document clustering
- highly scalable
- document analysis
- query evaluation
- processing queries
- relational databases
- multidatabase environment
- index structure