Keyphrases
- keyword search
- relational databases
- xml databases
- xml keyword search
- search engine
- xml documents
- relational data
- xml data
- keywords
- keyword queries
- relational model
- database
- semantic search
- databases
- functional dependencies
- search queries
- sql queries
- object oriented
- structured data
- database schema
- relational database systems
- entity relationship
- web search engines
- normal form
- structured query language
- query keywords
- keyword search over relational databases
- semistructured databases
- proximity search
- proxy re encryption
- data structure
- natural language