Keyphrases
- information retrieval
- spatial and temporal
- temporal constraints
- information retrieval systems
- search engine
- temporal databases
- information extraction
- temporal data
- text mining
- temporal reasoning
- temporal information
- test collection
- temporal consistency
- computational linguistics
- language modeling
- query expansion
- spatio temporal
- temporal relations
- text retrieval
- vector space model
- information access
- database
- temporal evolution
- databases
- structured documents
- relevance feedback
- retrieval systems
- web search
- text classification
- learning to rank
- question answering
- retrieval model
- space time