On 4/7/2015 0:40, Nikolaos Beredimas wrote:
Thanks Holger.
If I undestand you correctly, the bottom line is that it doesn't make
sense to develop/model, as a standard, any behavior that cannot stand
alongside basic inferencing.
I think I agree with that.
I will have to read up on the Shapes WG and SHACL and possibly ask
further questions there, but if you can
what are the similiarities and or differencies between the Shapes WG
and the discussions at
https://lists.w3.org/Archives/Public/public-rdf-shapes/
That mailing list was the public discussion forum of the group prior to
its official forming. The WG itself, and a link to its (busy) mailing
list, can be found at
https://www.w3.org/2014/data-shapes/wiki/Main_Page
Holger
Τη Σάββατο, 4 Απριλίου 2015 - 6:42:45 π.μ. UTC+3, ο χρήστης Holger
Knublauch έγραψε:
Hi Nikolaos,
this is certainly an interesting question, yet I don't see how to
solve this. As soon as inferencing is activated, and you have a
class hierarchy such as
rdfs:Resource
ex:RootClass rule1
ex:ChildClass rule2 overrides rule1
and ex:Instance a ex:ChildClass, then an inference engine would
add ex:Instance a ex:RootClass, and things become really messy to
check. I believe rules and constraints should only ever narrow
down the semantics.
It would help me to see a real-world example of such scenarios.
Maybe there are work-arounds using multiple inheritance/multiple
rdf:types.
BTW this is an interesting discussion in regards to the ongoing
W3C Shapes Working Group, that quite possibly creates something
close to a "SPIN 2.0", called SHACL [1]. In that spec, take a look
at the proposed sh:scope attribute that would allow you to place
pre-conditions in front of constraints.
Thanks
Holger
[1] https://w3c.github.io/data-shapes/shacl/
<https://w3c.github.io/data-shapes/shacl/>
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