Keyphrases
- unstructured text
- text mining
- information extraction
- structured data
- web documents
- semi structured
- textual data
- database
- structured information
- text data
- data sources
- query processing
- data sets
- keyword search
- query evaluation
- metadata
- query terms
- user queries
- relevance feedback
- retrieval systems
- text classification
- semistructured data
- natural language