Keyphrases
- metadata
- open standards
- xml documents
- xml data
- information integration
- xml databases
- databases
- markup language
- xml schema
- open source
- xml queries
- semi structured
- relational databases
- information systems
- object oriented
- data model
- web services
- xml format
- xml retrieval
- database
- data integration
- data exchange
- digital libraries
- web service technology
- data transformation
- metadata schemas
- data sources
- xpath queries
- extensible markup language
- xml technology
- interoperability issues
- ontology mapping
- semi structured data
- data representation
- relational data
- information sharing
- data types
- information retrieval
- data sets