Keyphrases
- query relaxation
- rdf data
- knowledge driven
- approximate answers
- semantic web
- query language
- storage and retrieval
- web databases
- linked data
- query processing
- databases
- query answering
- data sources
- data model
- rdf graphs
- knowledge management
- knowledge representation
- multi dimensional
- database
- web search
- web resources
- complex queries
- relational databases
- aggregate queries
- metadata
- knowledge base