About https://w3id.org/scholarlydata/inproceedings/iswc-2018-poster_and_demo-390

Subject: https://w3id.org/scholarlydata/inproceedings/iswc-2018-poster_and_demo-390Property: http://www.w3.org/1999/02/22-rdf-syntax-ns#typehttps://w3id.org/scholarlydata/ontology/conference-ontology.owl#InProceedingsProperty: http://www.w3.org/2000/01/rdf-schema#labelQCan: Normalising Congruent SPARQL QueriesProperty: http://purl.org/dc/elements/1.1/creatorhttps://w3id.org/scholarlydata/person/jaime-salashttps://w3id.org/scholarlydata/person/aidan-hoganProperty: https://w3id.org/scholarlydata/ontology/conference-ontology.owl#abstractWe have developed a method to canonicalise (aka. normalise) SPARQL queries with respect to query equivalence. Two queries are equivalent iff they return the same answers over any dataset. Our canonicalisation method deterministically rewrites a given input query to an equivalent canonical form such that the results for two queries are syntactically (string) equal if and only if they are equivalent. The process can also canonicalise variable names. Our canonicalisation method is sound and complete for a monotone fragment of SPARQL with selection (equalities), projection, join and union under both set and bag semantics. Considering other SPARQL features (e.g., optional, filter, graph, etc.), the underlying equivalence problem becomes undecidable, where we currently rather support a best-effort canonicalisation for other SPARQL 1.0. features The potential use-cases for such a canonicalisation procedure include caching, query log analysis, signing queries, query optimisation, etc. In the Poster and Demo session, we will demonstrate a prototype of our canonicalisation framework, provide example rewritings, and discuss limitations, potential use-cases and future directions.Property: https://w3id.org/scholarlydata/ontology/conference-ontology.owl#hasAuthorListhttps://w3id.org/scholarlydata/authorlist/iswc-2018-poster_and_demo-390Property: https://w3id.org/scholarlydata/ontology/conference-ontology.owl#isPartOfhttps://w3id.org/scholarlydata/conference/iswc/2018/proceedingsProperty: https://w3id.org/scholarlydata/ontology/conference-ontology.owl#keywordcachingquery logsquery equivalencesparqlProperty: https://w3id.org/scholarlydata/ontology/conference-ontology.owl#titleQCan: Normalising Congruent SPARQL Queries
Subject: https://w3id.org/scholarlydata/person/aidan-hoganProperty: http://xmlns.com/foaf/0.1/madehttps://w3id.org/scholarlydata/inproceedings/iswc-2018-poster_and_demo-390
Subject: https://w3id.org/scholarlydata/conference/iswc/2018/proceedingsProperty: https://w3id.org/scholarlydata/ontology/conference-ontology.owl#hasParthttps://w3id.org/scholarlydata/inproceedings/iswc-2018-poster_and_demo-390
Subject: https://w3id.org/scholarlydata/person/jaime-salasProperty: http://xmlns.com/foaf/0.1/madehttps://w3id.org/scholarlydata/inproceedings/iswc-2018-poster_and_demo-390
Subject: https://w3id.org/scholarlydata/role-during-event/iswc2018-author-aidan-hogan-iswc-2018-poster_and_demo-390Property: https://w3id.org/scholarlydata/ontology/conference-ontology.owl#withDocumenthttps://w3id.org/scholarlydata/inproceedings/iswc-2018-poster_and_demo-390
Subject: https://w3id.org/scholarlydata/role-during-event/iswc2018-author-jaime-salas-iswc-2018-poster_and_demo-390Property: https://w3id.org/scholarlydata/ontology/conference-ontology.owl#withDocumenthttps://w3id.org/scholarlydata/inproceedings/iswc-2018-poster_and_demo-390