Keyphrases
- document collections
- information retrieval
- information retrieval systems
- database
- expert systems
- tf idf
- vector space model
- document clustering
- document analysis
- retrieval systems
- document retrieval
- web documents
- text documents
- document images
- user queries
- document representation
- text analysis
- digital documents
- multimedia documents
- structured documents
- document classification
- relevant documents
- machine learning