Utility-aware Semantics for Alternative Service Expressions in Federated SPARQL Queries.
Lars HelingMaribel AcostaPublished in: ICWS (2022)
Keyphrases
- sparql queries
- rdf data
- graph model
- query language
- query optimization
- relational algebra
- cost model
- query formulation
- rewriting rules
- graph patterns
- data sources
- rdf graphs
- sql queries
- natural language
- data model
- object oriented
- distributed systems
- query processing
- query patterns
- complex objects
- query plan
- web services
- expressive power
- clustering method
- database systems