Keyphrases
- metadata
- metadata standards
- digital libraries
- metadata schema
- databases
- learning objects
- open standards
- dublin core
- metadata management
- earth science data
- multimedia
- structured data
- semantic search
- semantic interoperability
- metadata extraction
- digital preservation
- statistical information
- digital content
- learning resources
- search tools
- multimedia content
- scientific publications
- semantic web
- database systems
- information systems