Keyphrases
- keyword search
- relational databases
- query language
- keywords
- search engine
- xml documents
- structured data
- xml keyword search
- xml data
- xml databases
- data model
- relational data
- keyword queries
- semantic web
- semantic search
- web search engines
- search queries
- metadata
- database
- keyword search in relational databases
- xml schema
- faceted search
- topic maps
- rdf data
- object oriented
- proxy re encryption
- semantic annotation
- data sources