Keyphrases
- aggregation queries
- aggregation functions
- semantic query
- query processing
- query language
- natural language
- response time
- efficient processing
- query formulation
- semantic annotation
- query evaluation
- semantically similar
- domain specific
- aggregate queries
- semantic web
- database
- database queries
- semantic knowledge
- semantic network
- complex queries
- user queries
- web search engines
- data sources
- semantic representation
- semantic information
- aggregation operators
- rank aggregation
- semantic constraints
- data model
- database systems