Keyphrases
- structured data
- focused crawling
- semi structured
- web sources
- web documents
- information extraction
- topic specific
- data sources
- xml documents
- text content
- semantic information
- keyword search
- web pages
- textual data
- search tools
- web mining
- metadata
- text data
- data extraction
- databases
- website
- machine learning
- keyword queries
- information integration
- web data