Keyphrases
- xml documents
- markup language
- xml format
- digital libraries
- xml data
- xml retrieval
- xml databases
- xml queries
- xml schema
- data representation
- theorem prover
- metadata
- relational databases
- data model
- formal methods
- semistructured data
- databases
- document centric
- keyword search
- data exchange
- multimedia
- data integration
- xpath queries
- commercial and open source
- object oriented databases
- integrity constraints
- software engineering
- object oriented
- document structure
- database