Keyphrases
- semantic web
- wordnet
- commonsense knowledge
- linked data
- databases
- metadata
- data model
- spreading activation
- query expansion
- inference control
- relational data
- rdf data
- encoding scheme
- fractal image compression
- data sources
- database systems
- knowledge representation
- formal semantics
- sparql queries
- query language
- semantic data
- automatic query expansion
- owl dl ontologies