Keyphrases
- metadata
- dublin core
- digital libraries
- xml access control
- xml databases
- metadata schema
- access control
- linked open data
- learning objects
- semantic information
- topic maps
- database
- databases
- xml schema
- linked data
- xml data
- semantic data
- structured data
- fine grained
- security policies
- semantic web
- rdf graphs
- information sources
- data mining