>From https://www.w3.org/TR/sparql11-property-paths/,
*elt** A path of zero or more occurrences of *elt*.
With regards,
Jason Koh
cseweb.ucsd.edu/~jbkoh
On Sat, May 12, 2018 at 2:10 PM, Jason Koh <jb...@eng.ucsd.edu> wrote:
> Hi Kingsley,
>
> I put * path modifier, which should also match no subClassOf relationship
> pattern in my understanding.
>
>
> With regards,
> Jason Koh
> cseweb.ucsd.edu/~jbkoh
>
> On Sat, May 12, 2018 at 1:57 PM, Kingsley Idehen <kide...@openlinksw.com>
> wrote:
>
>> On 5/11/18 4:56 PM, Jason Koh wrote:
>>
>> Hi,
>>
>> I am using Virtuoso opensource v7.2.4. I found that SPARQLs with
>> transitive relationships return partial results. Could you confirm this
>> behavior? Here are the reproducing ISQL queries.
>>
>> - Data insertion:
>>
>> ```
>> sparql
>> prefix : <http://test.abc#>
>> prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
>> prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
>> prefix owl: <http://www.w3.org/2002/07/owl#>
>> insert IN GRAPH <urn:test1>
>> {
>> :class1 a owl:Class .
>> :class2 a owl:Class .
>> :entity0 a :class1.
>> :entity1 a :class2.
>> :entity2 a :class2.
>> :entity0 :relation1 :entity1.
>> :entity0 :relation1 :entity2.
>> };
>> ```
>>
>> - Verification of the data
>>
>> ```
>> sparql
>> select ?s ?p ?o from <urn:test1> where {?s ?p ?o .};
>> ```
>>
>> - The problem query
>> ```
>> sparql
>> prefix : <http://test.abc>
>> prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
>> select ?s ?o where {
>> #?o a/rdfs:subClassOf* :class2. # Only returns a tuple. I think
>> incorrect.
>> ?o a :class2. # returns all the tuples. I think correct.
>> ?s :relation1 ?o.
>> };
>> ```
>>
>> If I run the above query, it only returns one pair of ?s and ?o instead
>> of two pairs of (entity0, entity1) and (entity0, entity1). If I comment out
>> the transitive line and uncomment the second line, it returns the correct
>> result with the two pairs. I believe those two queries should return the
>> same result.
>>
>> Is this a bug or do I misunderstand something in the SPARQL?
>>
>> Thank you!
>>
>>
>>
>> With regards,
>> Jason Koh
>> cseweb.ucsd.edu/~jbkoh <http://cseweb.ucsd.edu/%7Ejbkoh>
>>
>>
>> You have:
>>
>> ```
>> sparql
>> prefix : <http://test.abc#>
>> prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
>> prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
>> prefix owl: <http://www.w3.org/2002/07/owl#>
>> insert IN GRAPH <urn:test1>
>> {
>> :class1 a owl:Class .
>> :class2 a owl:Class .
>> :entity0 a :class1.
>> :entity1 a :class2.
>> :entity2 a :class2.
>> :entity0 :relation1 :entity1.
>> :entity0 :relation1 :entity2.
>> };
>> ```
>>
>> Where have are your rdfs:subClassOf relations?
>>
>>
>> [1] http://docs.openlinksw.com/virtuoso/rdfsparqlruleexamples/ --
>> built-in inference docs .
>>
>>
>> --
>> Regards,
>>
>> Kingsley Idehen
>> Founder & CEO
>> OpenLink Software (Home Page: http://www.openlinksw.com)
>>
>> Weblogs (Blogs):
>> Legacy Blog: http://www.openlinksw.com/blog/~kidehen/
>> Blogspot Blog: http://kidehen.blogspot.com
>> Medium Blog: https://medium.com/@kidehen
>>
>> Profile Pages:
>> Pinterest: https://www.pinterest.com/kidehen/
>> Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen
>> Twitter: https://twitter.com/kidehen
>> Google+: https://plus.google.com/+KingsleyIdehen/about
>> LinkedIn: http://www.linkedin.com/in/kidehen
>>
>> Web Identities (WebID):
>> Personal: http://kingsley.idehen.net/public_home/kidehen/profile.ttl#i
>> :
>> http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this
>>
>>
>> ------------------------------------------------------------
>> ------------------
>> Check out the vibrant tech community on one of the world's most
>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>> _______________________________________________
>> Virtuoso-users mailing list
>> Virtuoso-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/virtuoso-users
>>
>>
>
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Virtuoso-users mailing list
Virtuoso-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/virtuoso-users
