Nice! (only the spec using it is using OWL)
Still very nice solution in SHACL to keep in mind, Michel Ps This was the direction I was thinking of in OWL too, some inversefunctional restriction (wrt rdf:type) in context of a class...seems not to work that way, guess in the end OWA related... (since it works fine as you show in CWA shacl) Dr. ir. H.M. (Michel) Böhms Senior Data Scientist T +31888663107 M +31630381220 E michel.bo...@tno.nl<mailto:michel.bo...@tno.nl> Location<https://www.google.com/maps/place/TNO+-+Locatie+Delft+-+Stieltjesweg/@52.000788,4.3745183,17z/data=!3m1!4b1!4m5!3m4!1s0x47c5b58c52869997:0x56681566be3b8c88!8m2!3d52.000788!4d4.376707> [cid:image001.gif@01D4FF79.CF280860]<http://www.tno.nl/> This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. TNO accepts no liability for the content of this e-mail, for the manner in which you use it and for damage of any kind resulting from the risks inherent to the electronic transmission of messages. From: topbraid-users@googlegroups.com <topbraid-users@googlegroups.com> On Behalf Of Irene Polikoff Sent: dinsdag 30 april 2019 16:15 To: topbraid-users@googlegroups.com Subject: Re: [topbraid-users] singleton I do not see how this could be one in OWL, but you can do it in SHACL. ex:SingletonClas a owl:Class; a sh:NodeShape; sh:path [ sh:inversePath rdf:type ; ] ; sh:maxCount 1. This would not prevent it having additional instances from subclasses as the constraint only deals with the direct instances. You could do something more complex with paths to address possible indirect instances if this is even a consideration. On Apr 30, 2019, at 6:52 AM, 'Bohms, H.M. (Michel)' via TopBraid Suite Users <topbraid-users@googlegroups.com<mailto:topbraid-users@googlegroups.com>> wrote: Hmmm, the one instance is not static, but changing... (so I was looking for a certain restriction on class level like “can contain max 1 instance”). Guess not inline with open world assumption anyway...? Dr. ir. H.M. (Michel) Böhms Senior Data Scientist T +31888663107 M +31630381220 E michel.bo...@tno.nl<mailto:michel.bo...@tno.nl> Location<https://www.google.com/maps/place/TNO+-+Locatie+Delft+-+Stieltjesweg/@52.000788,4.3745183,17z/data=!3m1!4b1!4m5!3m4!1s0x47c5b58c52869997:0x56681566be3b8c88!8m2!3d52.000788!4d4.376707> <image001.gif><http://www.tno.nl/> This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. TNO accepts no liability for the content of this e-mail, for the manner in which you use it and for damage of any kind resulting from the risks inherent to the electronic transmission of messages. From: topbraid-users@googlegroups.com<mailto:topbraid-users@googlegroups.com> <topbraid-users@googlegroups.com<mailto:topbraid-users@googlegroups.com>> On Behalf Of dprice Sent: dinsdag 30 april 2019 12:36 To: topbraid-users@googlegroups.com<mailto:topbraid-users@googlegroups.com> Subject: Re: [topbraid-users] singleton On 30 Apr 2019, at 09:44, 'Bohms, H.M. (Michel)' via TopBraid Suite Users <topbraid-users@googlegroups.com<mailto:topbraid-users@googlegroups.com>> wrote: I there anyway to restrict a class to one instance in OWL? Make an enumerated class with only one individual that is of type the class. See https://www.w3.org/TR/owl2-syntax/#Enumeration_of_Individuals Note that you can create the class in one graph, and enumerate the individuals in a second if you need to partition instances from classes and/or allow for different individuals in different contexts. Cheers, David (ie singleton) Thx Michel Dr. ir. H.M. (Michel) Böhms Senior Data Scientist T +31888663107 M +31630381220 E michel.bo...@tno.nl<mailto:michel.bo...@tno.nl> Location<https://www.google.com/maps/place/TNO+-+Locatie+Delft+-+Stieltjesweg/@52.000788,4.3745183,17z/data=!3m1!4b1!4m5!3m4!1s0x47c5b58c52869997:0x56681566be3b8c88!8m2!3d52.000788!4d4.376707> <image001.gif><http://www.tno.nl/> This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. 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