Keyphrases
- information retrieval
- document collections
- web documents
- document images
- information retrieval systems
- document classification
- document analysis
- structured documents
- retrieval systems
- semantic information
- natural language processing
- digital documents
- text documents
- document retrieval
- keywords
- visual languages
- document structure
- grammatical inference
- relevant documents
- context free grammars
- semantic analysis
- relational databases
- feature selection