Keyphrases
- semi structured
- data extraction
- web documents
- web data
- web data sources
- semi structured data
- web sources
- web scale
- structured data
- web information extraction
- information integration
- semistructured databases
- information extraction
- data model
- keyword queries
- search interface
- wrapper generation
- html pages
- web data extraction
- text mining
- databases
- web information
- free text
- semi structured documents
- web databases
- xml databases
- knowledge rich
- query language
- website
- content and structure
- query interface
- structured knowledge
- unstructured data
- web pages
- web content
- database
- linked data
- html documents
- deep web
- web mining
- unstructured text
- data collections
- natural language processing
- conceptual graphs