Designing a Query Language for RDF: Marrying Open and Closed Worlds
international conference on management of data, pp. 21:1-21:46, 2017.
Query languages RDF SPARQL monotonicity open-world assumptionMore(1+)
When querying an RDF graph, a prominent feature is the possibility of extending the answer to a query with optional information. However, the definition of this feature in SPARQL --the standard RDF query language-- has raised some important issues. Most notably, the use of this feature increases the complexity of the evaluation problem, a...More
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