Keyphrases
- information retrieval
- document collections
- text documents
- information retrieval systems
- web documents
- document classification
- document clustering
- metadata
- document retrieval
- database
- digital documents
- document representation
- web data
- co occurrence
- neural network
- text classification
- ranked list
- text mining
- vector space model
- feature selection
- text analysis
- index terms
- logical structure