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Re: [mdt-uml2.dev] conformsTo and interfaces
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Hi,
Not quite sure what you mean by a OMG UML 2.5 issue. Looked on the OMG
site but found no place for bugs.
Anyhow, raised https://bugs.eclipse.org/bugs/show_bug.cgi?id=425476
As an aside, I came across this issue while trying to implement a
property subsetting a derived union property defined on an interface.
Thanks
Pieter
On 10/01/2014 10:45, Ed Willink wrote:
Hi
In UML we a have the structural type definition concept of
generalization.
For execution (in OCL) we have the type reference compatibility
concept of conformance. i.e. B can be used in a context expecting A,
if B conforms to A.
The relationship between these concepts is not clearly defined. With
the OCL pivot model I am working to align the two concepts so that
when a UML meta-model is loaded as a pivot model the necessary
conversions from a generalization hierarchy to a conformance hierarchy
are made in the loaded pivot meta-model. e.g. all root user classes
conformTo OclElement that conformsTo OclAny. conformsTo is then
modeled rather than computed.
The OCL execution concept is confusingly specified by the UML
conformsTo method.
Looking at UML 2.5, which is much easier to study,
Classifier::conformsTo correctly looks at generals only. The issue is
whether a BehavioredClassifier::conformsTo overload should extend the
conformance to realized interfaces. This is the kind of problem we are
only just starting to encounter as we get close to being able to
animate the UML specification. Please raise an OMG UML 2.5 issue.
Regards
Ed Willink
On 09/01/2014 17:35, Pieter Martin wrote:
Hi,
I noticed that the ClassifierImpl.conformsTo only check generals and
not for realized interfaces.
from the ocl spec it says "Classes conform to superclasses and
interfaces that they realize."
Is this a bug?
Thanks
Pieter
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