Keyphrases
- xml documents
- xml data
- structured data
- xml schema
- relational databases
- xml queries
- xml databases
- xml information retrieval
- integrity constraints
- relational data
- keyword search
- sql queries
- semi structured data
- xpath queries
- querying xml documents
- content and structure
- databases
- structured documents
- semantic information
- semantic web
- data model
- data mining