Re: Constraints on classes

On Fri, Apr 24, 2015 at 4:38 PM, Peter F. Patel-Schneider <
pfpschneider@gmail.com> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>
> I believe that approved requirement 2.12.2
> http://www.w3.org/2014/data-shapes/wiki/Requirements#Selection_by_type
> covers these situations.   User story S2 is based on selection by type.
>
> Both SPIN and Stardog ICV can do this, as can both of the SPARQL-based
> proposals.  I don't believe that Shape Expressions can do this without
> having
> bare negation.


In general, Shape Expressions are agnostic with regards to which nodes are
selected to validate. It would not be a problem to include a mechanism to
select nodes by type.


> As far as I can tell, Resource Shape 2.0 can't do this,
> although I  remain confused as to how Resource Shape 2.0 works.
>


>
> peter
>
>
> On 04/24/2015 06:56 AM, Karen Coyle wrote:
> > I've been trying to understand if this is covered by existing
> requirements o
> r
> > not...
> >
> > The Dublin Core set of requirements for application profiles (including
> > validation)[1] has some constraints based on classes (read: rdf:type) not
> > properties. For example,
> >
> > - For every node/graph of type edm:CHO there must also be a linked
> node/grap
> h
> > of type ore:Aggregation.
> >
> > - For every node/graph of type ex:Book there can be 0..n linked nodes of
> typ
> e
> > ex:Author, but no nodes of type ex:Composer.
> >
> > I asked this many moons ago and was assured that it was included in the
> > existing requirements, but if it's there I haven't identified it. Is this
> > covered, or do I need to add a story+requirement proposal?
> >
> > BTW, we are doing an analysis comparing the DCMI requirements with this
> > group's requirements. This is one of the more significant gaps.
> >
> > Thanks,
> > kc
> >
> >
> > [1]
> http://wiki.dublincore.org/index.php/RDF_Application_Profiles/Requiremen
> ts
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v2
>
> iQEcBAEBCAAGBQJVOlVSAAoJECjN6+QThfjzVq8H/0E5ptRsd9gT73GjkJE+7Sg/
> 2FBITkAJfBxZ89H3v9cj/hwptYQtXTcfmq4uCRLwJprSajR0bhrgy3jPV8X5o2rc
> eLbo276P6sNcNi9jQPEbf4v2BBjHkxkR87shn7Afx1I4fOeLsYEb86ijpBP7M4bz
> gYQySx1tehTQrJwAXPkshdk/4nOTIIYQt9Qoxy59IAFMTWRed6P9ojAUpPnCWYZm
> i25QhywLydtBEPjQ1Yx70h1+ZI7NHP3k/D20poPazKJ5FwirCoKgex0OVrf3Z6Us
> 3ISuCBdQkCRQprnsGivg5EyG01bdLIJQokPQDC6jimvmwDlbaOt/k9hFaFysxKQ=
> =uOIV
> -----END PGP SIGNATURE-----
>
>


-- 
-- Jose Labra