> On 13 Nov 2023, at 11:42 pm, 'Bohms, H.M. (Michel)' via TopBraid Suite Users > <[email protected]> wrote: > > Too many extra classes that are nonsemantical...would my proposed solution > not be more natural?
I don't know the full model and cannot really comment further on this. Holger > > Op 13 nov. 2023 23:28 schreef Holger Knublauch <[email protected]>: > Can you not simply introduce a superclass :VehiclePart? > > Holger > > > On 13 Nov 2023, at 6:09 pm, 'Bohms, H.M. (Michel)' via TopBraid Suite Users > <[email protected]> wrote: > > One more idea on this. > > Would it be better to model the typical decomposition via some union range. > > :Vehicle > a owl:Class ; > rdfs:subClassOf [ > a owl:Restriction ; > owl:minQualifiedCardinality "0"^^xsd:nonNegativeInteger ; > owl:onClass :Engine ; > owl:onProperty :hasPart ; > ] . > > >>> > > :Vehicle > a owl:Class ; > rdfs:subClassOf [ > a owl:Restriction ; > owl:allValuesFrom owl:unionOf (:Engine, :Chassis, …) ; > owl:onProperty :hasPart ; > ] . > > ??? > (similar in shacl, sh:class being a union etc.) > > Thx Michel > > From: 'Bohms, H.M. (Michel)' via TopBraid Suite Users > <[email protected]> > Sent: vrijdag 10 november 2023 15:14 > To: [email protected] > Subject: Re: [topbraid-users] question wrt qualified constraint > > Hi holger, david > > See all your points. > Wished decomposition was better incorporated in our modelling languages, like > in uml eg. > > Specializing properties like hasEngine is a solution but you loose the actual > decomposition semantics or you have to assume it in the "has" of "hasX" but > typically "has" is also used for attributes or nonpart relations. > > Anyway, thx for your views > Michel > > Op 10 nov. 2023 13:21 schreef David Price <[email protected] > <mailto:[email protected]>>: > Following on from Holger’s comment … > > Typical” and “relevance” are not generally supported modeling concepts in > RDF-land. “possible" and “cardinality" are basically it. > > Min 0 just means optional and is therefore ignored by every rdf-based engine > I know. > > I guess in SHACL you could make a property shape that did a SPARQL NOT EXISTS > and report an sh:Warning or sh:Info rather than a sh:Violation. But users > might get tired of seeing the warnings repeatedly. > > If you need to communicate “typical” to humans, then the documentation is a > much better place. If I see “min 0” in a data model, I usually assume it’s a > mistake and so would probably not understand the intent. > > Cheers, > David > > On 10 Nov 2023, at 12:20, Holger Knublauch <[email protected] > <mailto:[email protected]>> wrote: > > In almost all cases that I have seen, qualified value constraints are a pain > to work with, either in OWL or SHACL. I have no recommendations for them as I > almost never use them. I would just introduce a property :hasEngine and get > rid of :hasPart. > > Holger > > > On 10 Nov 2023, at 1:09 pm, 'Bohms, H.M. (Michel)' via TopBraid Suite Users > <[email protected] <mailto:[email protected]>> > wrote: > > Ok, thx > > So there is also no better way to model that y and z are typical (can be) > parts of x where say r and s are not. > Like kind of qualified closure like sh:closed is on property level.... > Michel > > Op 10 nov. 2023 12:08 schreef Holger Knublauch <[email protected] > <mailto:[email protected]>>: > In both cases the constraint isn't doing any validation at all, so you can > leave the sh:qualifiedMinCount out, if you only intend to use it to indicate > relevance. > > Holger > > > On 10 Nov 2023, at 10:23 am, 'Bohms, H.M. (Michel)' via TopBraid Suite Users > <[email protected] <mailto:[email protected]>> > wrote: > > I have a qualified constraint question. > > To define a meronomy (typical hasPart hierarchy) we now use in OWA/OWL: > > :Vehicle > a owl:Class ; > rdfs:subClassOf [ > a owl:Restriction ; > owl:minQualifiedCardinality "0"^^xsd:nonNegativeInteger ; > owl:onClass :Engine ; > owl:onProperty :hasPart ; > ] . > > We explicitly model this mincard=0 to indicate relevance (it is not an > obligatory part). > (because we cannot leave the restriction out). > > Now my question how does this translate into cwa/shacl? > > :VehicleShape > a sh:NodeShape ; > sh:targetClass :Vehicle ; > sh:property [ > sh:path :hasPart ; > sh:qualifiedMinCount 0 ; > sh:qualifiedValueShape [ > sh:class :Engine ; > ] ; > sh:qualifiedMinCount 0 ; > . > > Or can I delete the red now? > > Similar (example not for decomposition): > > sh:property [ sh:path > https://w3id.org/nen2660/def#hasInterior ; > sh:qualifiedValueShape [ sh:class > https://otl.waternet.nl/def/cff9206f-72ae-4eb8-a671-9c3dd73b62c0 ] > ] . > > Is it ok to leave minCard/maxCard out? > > Personally I guess NOT since I always have to give the actual constraint > where the valueshape is ‘just’ the context when to be applied, right? > > So I put in minCar = 0 again or is there in shape a smarter way to indicate > this “relevance”? > > Thx a lot, Michel > > > Michel Böhms > Data Scientist > > <image001.png> > > Mobile +31 630381220 > E-mail [email protected] <mailto:[email protected]> > Location <https://nextdelft.com/> > > > <image002.gif> <http://www.tno.nl/> > This message may contain information that is not intended for you. 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