Keyphrases
- xml documents
- markup language
- long term
- databases
- historical information
- xml data
- xml databases
- xml schema
- relational databases
- past observations
- metadata
- data model
- data exchange
- information technology
- xml queries
- real world
- xml format
- information retrieval systems
- semi structured
- relational data
- data representation
- data mining
- data centric
- data transformation
- database