[gme-users] Instances

[Peter Volgyesi]

(Right now) the meta modeling environment and the meta part of GME
(meta.dll) does not deal with the type/instance feature (it is totally meta
model independent). So - as you already guessed - the only way to enforce
these rules is to create constraints (the part browser will still propose
the "invalid" options).
Sorry.
--
peter


> -----Original Message-----
> From: gme-users-bounces at list.isis.vanderbilt.edu 
> [mailto:gme-users-bounces at list.isis.vanderbilt.edu] On Behalf 
> Of Jacques Kerner
> Sent: Thursday, July 01, 2004 3:45 PM
> To: A list for GME users to share thoughts and discuss bugs and fixes.
> Subject: [gme-users] Instances
> 
> Hi all,
> 
> I have a question about instances in a model. I would like to 
> know how I can force a Model to contain only instances of, 
> say, an Atom but not the non instances of this Atom. I can do 
> it with constraints, but what is annoying is that the part 
> window proposes to add the Atom. I was wondering if there was 
> a nicer way to do this.
> 
> To illustrate my problem, I can take the example of UML, with 
> the sequence diagram as opposed to the class diagram. A class 
> diagram can contain objects of kind "Class". You can drag and 
> drop a "Class" to the "Class Diagram" model (you can do this 
> with GME alright). Now, in the sequence diagram, when you 
> drag and drop a "Class" from the part window, you would like 
> them to become automatically instances of the class, and not 
> the class itself, but I did not find a way to do this automatically. 
> An alternative would be to be unable to drag and drop 
> classes, but only do it when they are instances. How can you 
> say that a model contain only instances of an object in the 
> Meta Model ?
> 
> I hope this rings a bell. Thank you in advance.
> 
> Jacques Kerner.
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