Keyphrases
- information retrieval systems
- information retrieval
- document collections
- query expansion
- retrieval systems
- retrieval model
- retrieval effectiveness
- relevance feedback
- relevant documents
- document indexing
- user queries
- retrieval engine
- structured documents
- inverted file
- database
- xml retrieval
- interactive information retrieval
- document retrieval
- query processing
- retrieval quality
- user modelling
- ontology based semantic