Keyphrases
- keyword search
- rdf graphs
- query language
- structured data
- linked data
- relational databases
- search engine
- keywords
- semantic web
- xml data
- data model
- xml keyword search
- xml documents
- xml databases
- expressive power
- keyword queries
- sparql queries
- rdf data
- semantic search
- query evaluation
- search queries
- metadata
- database
- keyword search over relational databases
- object oriented
- regular expressions
- xml queries
- conceptual model
- web search engines
- data integration
- database management systems
- information retrieval systems
- information retrieval