Keyphrases
- language model
- query rewriting
- language modeling
- query answering
- query optimization
- conjunctive queries
- document retrieval
- information retrieval
- n gram
- retrieval model
- probabilistic model
- test collection
- query expansion
- spatial databases
- query execution
- data integration
- smoothing methods
- query terms
- xml queries
- xpath queries
- integrity constraints
- query evaluation
- query result
- data exchange