On the subject of " WRT “best practice” I do sometimes find RDFS that has nothing defining how the named graphs relate, sometimes with multiple named graphs in the same RDF/XML or TTL file. Usually what you find is that the developers of that content actually manage everything separately and then concatenate it into a singe TTL at the end. It seems they assume whatever triples they produce is *all* the triples and/or can be concatenated with anything else - IMO very odd indeed and not nearly as useful to others as having the original separate files."
This "flattening of imports in a selective way that suits some specific needs I have.. " is a very common pattern (and IMHO an anti-pattern that loses information about interoperability intent ..) Having come across this repeatedly when trying to determin or check the scope of application of standardised models, I generated a "little" tool that addressed a few other issues as well, including non-resolution of identifiers for vocabularies only accessible via idiosyncratic repository interfaces... Its at https://github.com/RDFLib/profilewiz my hope is to be able to incorporate some of this in future into the TQ environment to support interoperable interfaces to graph using JSON-LD with controlled JSON schemas. I can imagine using an EDG instance to support the SHACL generation component and validation services as well as publishing the results. On Wednesday, 16 June 2021 at 01:26:15 UTC+10 Bohms, H.M. (Michel) wrote: > Thank you Holger, David > > > > Very useful arguments we can use in our justification for choices, > > Michel > > > > > > Dr. ir. H.M. (Michel) Bohms > Scientist Specialist > Structural Reliability > > T +31 (0)88 866 31 07 > M +31 (0)63 038 12 20 > E [email protected] > > Location <http://www.tno.nl/locations/DTS> > > > > <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. > > > > *Van:* [email protected] <[email protected]> *Namens > *David > Price > *Verzonden:* dinsdag 15 juni 2021 15:30 > *Aan:* [email protected] > *Onderwerp:* Re: [topbraid-users] rdfs using owl > > > > > > > > On 15 Jun 2021, at 14:07, Holger Knublauch <[email protected]> wrote: > > > > owl:imports is the only feature of OWL that even SHACL mentions because > there is no real alternative, and it is quite harmless. > > Holger > > > > I was writing something which I guess explains Holger's “no real > alternative” statement. Modularization of RDF-based ontologies and data is > the business use case being supported and it cannot be done in formally > defined, not implementation-specific way using only RDF and RDFS. > > > > TBC uses owl:import to define the graph closure for a domain of interest. > > > > RDFS says zero about named graphs, depending on RDF. RDF talks about RDF > Datasets and the default graph which is the union of everything visible to > the RDF tool (as far as I can interpret it) but the spec says nothing about > how the “collection of RDF graphs” is defined or located. It also says > nothing about how the “set of RDF Triples” that constitute the RDF Graph is > defined or located. > > > > Give that neither the “set of triples” or “collection of graphs” is > formally defined, it’s easy to argue that the SPARQL GRAPH keyword actually > has little or no formal meaning (does one graph need another and if so how > is that relation specified?). > > > > OWL introduces a more powerful way to manage and relate named graphs and > TBC takes advantage of that so users can control what triples are visible > where. Technically I think that is what the RDF spec means by “RDF source” > and I think that equates to the Ontology Document idea in the OWL2 spec. > > > > Anyway … RDFS purists can simply ignore (or remove) anything in the OWL > namespace if they have some other way to build RDF Datasets and Named > Graphs and graph relations in their tooling. In a way the OWL simply > provides hints about what the graph URIs are and how they are related to > other graphs for humans when ignored by the tool. In your standards case, > you started with OWL and “dumbed down" everything you could into RDFS > leaving only what formally defines the named graph closure. Note that the > OSLC which produces RDFS standard ontologies uses owl:Ontology to manage > named graphs, so TBC is also just following industry usage patterns (as are > you). > > > > WRT “best practice” I do sometimes find RDFS that has nothing defining how > the named graphs relate, sometimes with multiple named graphs in the same > RDF/XML or TTL file. Usually what you find is that the developers of that > content actually manage everything separately and then concatenate it into > a singe TTL at the end. It seems they assume whatever triples they produce > is *all* the triples and/or can be concatenated with anything else - IMO > very odd indeed and not nearly as useful to others as having the original > separate files. > > > > Not sure if that helps the EU, but explains how TBC works and why. > > > > Cheers, > > David > > > > > > On 15/06/2021 10:23 pm, 'Bohms, H.M. (Michel)' via TopBraid Suite Users > wrote: > > Dear Irene, David > > > > We got the following question on our EU standard proposal: > > > > Why are you using owl in your rdfs spec (for owl:Ontology and owl:imports). > > > > Isn’t this simply best practice? > > Could you do without ie be RDFS pure? > > > > But how then do you specify the graph uri and how to deal with imports?? > > > > Thx for your views, Michel > > > > > > > > > > Dr. ir. H.M. (Michel) Bohms > Scientist Specialist > Structural Reliability > > T +31 (0)88 866 31 07 > M +31 (0)63 038 12 20 > E [email protected] > > Location <http://www.tno.nl/locations/DTS> > > > > <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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