Keyphrases
- information retrieval
- document retrieval
- information retrieval systems
- retrieval systems
- structured documents
- document indexing
- multimedia documents
- document analysis
- query terms
- document collections
- text retrieval
- document content
- text clustering
- test collection
- relevant documents
- retrieval process
- document structure
- retrieval engine
- relevance feedback
- heterogeneous collections
- user queries
- semantic content
- query expansion
- index terms
- document level
- automatic categorization
- expert finding
- metadata
- term frequency
- keywords
- xml documents
- text categorization
- distributed information retrieval
- multimedia
- conceptual information
- interactive retrieval
- image database
- web documents
- semantic information
- retrieval model
- document clustering
- retrieval effectiveness
- video retrieval
- effective retrieval
- boolean queries
- retrieved documents
- web retrieval
- document ranking
- text documents
- similar documents
- content similarity
- xml elements
- text queries
- spoken documents