Keyphrases
- semantic search
- structured data
- keyword search
- linked data
- metadata
- semi structured
- xml documents
- information extraction
- semi structured data
- unstructured data
- semantic web
- structured information
- textual data
- unstructured text
- keyword queries
- data sources
- structured queries
- information retrieval
- web data
- multimedia
- domain ontology
- structured databases
- high level
- relational databases
- structured and unstructured data