On 14/04/2018 3:59, Irene Polikoff wrote:
Overrides are not supported, but inheritance is supported.

For example, you could define minCount but not define maxCount, then add a definition of maxCount in the “sub shape”.

There are 2 ways of addressing this:

  * Classes can also be shapes. If you model that way, all you need to
    do is to create a class of all things that your general property
    constraints will apply to, then create subclasses and add
    additional constraints to them.
      o For example, you would create a class Person with property
        shapes that say that a person must have name and age. Then you
        define a subclass Student with property shapes that say that
        students age must be greater than 15 and they need to have
        student ID.
  * Otherwise, shapes can contain other shapes. You would define a
    general shape with constraints you want to use in other shapes.
    When you define more specific shapes, you would include the
    general shape into them using sh:and.
      o https://www.w3.org/TR/shacl/#AndConstraintComponent



An alternative to using sh:and is simply sh:node. In shapes, sh:node fulfills a similar role as rdfs:subClassOf for classes. For example state ex:SubShape sh:node ex:SuperShape to ensure that all constraints defined for SuperShape also apply to the target nodes of SubShape. (Whether tools will understand this form of inheritance is another question - currently not all places of the TopBraid forms would use sh:node although I'd like to move there).

Holger





On Apr 13, 2018, at 1:20 PM, Rebecca Younes <rebecca.you...@gmail.com <mailto:rebecca.you...@gmail.com>> wrote:

A related question: is it possible for one shape to invoke, inherit, and/or override values from another shape? For example, I would like to create a general property shape for a title property that defines cardinality, sh:class, sh:path, etc. Then in the context of different form shapes, I would like to define specific names, descriptions, orders, etc.: "Album title," "Book title," and so on. Perhaps I would like to define a default name "Title," which could be overridden by the specific form shapes. Is any of this possible?

Thanks.

Rebecca Younes
Semantic Application Developer and Ontology Engineer
Cornell University Library Information Technology


On Thursday, April 12, 2018 at 4:17:52 PM UTC-4, Steven Folsom wrote:

    I would be interested to be able to look at any implementations
    where /Validation/ shapes are compiled with non-Validation shapes
    to build Forms, where that the validation axioms are maintained
    in separate shapes from non-validation (UI) shapes?


    Is anyone doing this? We’ve been considering it for easier
    maintenance of our various shapes, but right now it’s easier to
    see all the axioms needed for the app in one place…


    Thanks,
    Steven


--
    Steven Folsom

    Metadata Specialist

    Cornell University Library

    pronouns: he/him/they/them

    http://orcid.org/0000-0003-3427-5769
    <http://orcid.org/0000-0003-3427-5769>

    http://vivo.cornell.edu/individual/sf433
    <http://vivo.cornell.edu/individual/sf433>

    @sf433



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