Keyphrases
- query language
- information retrieval
- structured documents
- information retrieval systems
- expressive power
- data model
- document collections
- information extraction
- learning to rank
- search engine
- query evaluation
- test collection
- information access
- relational algebra
- document retrieval
- database
- query expansion
- text mining
- object oriented
- retrieval model
- semantic web
- text retrieval
- vector space model
- language processing
- multimedia
- computational linguistics