On 1/9/16 9:56 PM, Eng.Bassam wrote: > Hi > may be my question out of virtuoso, I don't know, wish someone answer > me and thanks :) > > is there any way to make inference queries in SPARQL, i.e may be I > have an ontology that have A is subclass from B also C owl:sameAS D > > how can I make inference queries? > get all B classes this will return also A classes (inheritance). > get all D classes this will return also D classes (owl:sameAS) > > thanks > > -- > ----------------------------------- > > Eng.Bassam Najeeb. > >Software Engineer.
I've written a number of posts about this matter. Basically, Virtuoso has in-built ability to perform reasoning and apply inference to the following entity relationship types (relations): owl:sameAs (explicit equivalence), owl:InverseFunctionalProperty (inferred equivalence), owl:equivalentClass, owl:equivalentProperty, owl:inverseOf, owl:SymmetricProperty, rdfs:subClassOf, and rdfs:subPropertyOf. When dealing with inheritance (subsumption) you have to use named graphs that contains rdfs:subClassOf, rdfs:subPropertyOf, owl:inverseOf, owl:equiventClass, or owl:equivalentProperty as the basis for your inference rule. Colloquially, graphs with Abox triples based on the aforementioned relationship types need to be used as the basis for your Virtuoso inference rules. When dealing with inference based on owl:InverseFunctional or owl:SymmetricProperty, you simply use an ontology that includes said relations as the inference rules basis. In the case of owl:sameAs, there is an in-built inference rule. Links: [1] http://kidehen.blogspot.com/2014/01/demonstrating-reasoning-via-sparql.html [2] http://kidehen.blogspot.com/2014/02/class-equivalence-based-reasoning.html [3] https://plus.google.com/+KingsleyIdehen/posts/711dfZYqGyA -- 2011 post about use of inference & reasoning for DBpedia data cleansing . Kingsley > > > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 > > > _______________________________________________ > Virtuoso-users mailing list > Virtuoso-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/virtuoso-users -- Regards, Kingsley Idehen Founder & CEO OpenLink Software Company Web: http://www.openlinksw.com Personal Weblog 1: http://kidehen.blogspot.com Personal Weblog 2: http://www.openlinksw.com/blog/~kidehen Twitter Profile: https://twitter.com/kidehen Google+ Profile: https://plus.google.com/+KingsleyIdehen/about LinkedIn Profile: http://www.linkedin.com/in/kidehen Personal WebID: http://kingsley.idehen.net/dataspace/person/kidehen#this
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