Keyphrases
- textual data
- database
- information extraction
- text mining
- structured data
- textual information
- query processing
- raw data
- data structure
- information retrieval
- text documents
- inverted index
- natural language processing
- text categorization
- data sets
- retrieval systems
- relevance feedback
- keywords
- knowledge discovery
- multimedia
- multimedia databases
- text data
- formal concept analysis