Keyphrases
- knowledge base
- description logics
- databases
- knowledge acquisition
- knowledge based systems
- text categorization
- query language
- multimedia databases
- semantic network
- query processing
- knowledge representation
- knowledge sources
- expert systems
- knowledge representation systems
- database
- background knowledge
- wordnet
- image sequences
- video retrieval
- information retrieval
- efficient retrieval
- reasoning process
- rdf data
- formal representation
- spatio temporal databases
- machine learning