Keyphrases
- metadata
- metadata schema
- xml schema
- databases
- dublin core
- digital libraries
- metadata management
- data model
- database
- database schema
- schema evolution
- learning objects
- multimedia content
- metadata extraction
- information resources
- metadata standards
- image editing
- open access
- rdf schema
- conceptual schema
- heterogeneous data sources
- statistical information
- information integration
- learning resources
- structured data