[news.eclipse.modeling.mdt.uml2] Question about extending classes with m

[eistoeter@xxxxxx (Alex )]

Hi

I made a custom uml profile for our models. At the moment it only contains 
three stereotypes. One is abstract and the other two inherit from this 
abstract stereotype.

I then established an extension for uml::Class and linked it with the 
abstract stereotype. I also made it be a required extension, so the 
multiplicity of the extension end ist 1...1

Now I assumed this means that any class in my model must ALWAYS HAVE 
EXACTLY ONE stereotype that inherits from my abstract stereotype.

But still it is possible to say:

umlClass.applyStereotype(ConcreteStereotype1);
umlClass.applyStereotype(ConcreteStereotype2);

Then my umlClass will have both stereotypes assigned. Is this a bug? For I 
guessed multiple stereotypes for metaclasses are only possible if you make 
an extension for each one?

Can someone bring light into this?

Best regards