Keyphrases
- structured documents
- effective retrieval
- information retrieval
- information retrieval systems
- digital libraries
- retrieval model
- structured document retrieval
- retrieval systems
- multimedia data
- xml documents
- text retrieval
- vector space model
- relevant documents
- web documents
- metadata
- relevance feedback
- document representation
- image retrieval
- language model
- search engine
- document retrieval
- user queries