Keyphrases
- structured data
- semi structured
- information extraction
- data sources
- relational data
- structured information
- semi structured data
- free text
- unstructured data
- linked data
- xml documents
- textual data
- semistructured data
- text databases
- keyword search
- text data
- structured databases
- keyword queries
- structured and unstructured data
- data sets
- tree kernels
- data management
- metadata