Keyphrases
- structured data
- semi structured
- relational data
- graph structures
- structured information
- keyword search
- unstructured data
- semi structured data
- xml documents
- information extraction
- textual data
- linked data
- free text
- metadata
- graph data
- data sources
- graph kernels
- structured databases
- structured and unstructured data
- social media
- search algorithm
- text databases
- xml data
- semistructured data
- database
- tree kernels
- tree structured data