RE: (ROSE) instance diagrams

[scaswell]

Title: RE: (ROSE) instance diagrams

I see your point about Rose.  I do use the "link" element on the collaboration diagram to show association instances.

 

And while I do use the collaboration diagram as an object diagram, I do wish Rose would provide real support for the object diagram.  Just like I wish they'd provide real support for marking a set of XOR relationships, ternary associations, and other important stuff in the UML that they don't support.  And the thing about not supporting object diagrams goes back to what I said earlier (which is my real gripe): I think the UML authors did us a real disservice when they downplayed the importance of object diagrams.

-----Original Message-----
From: Styve, Arne [mailto:[EMAIL PROTECTED]]
Sent: Thursday, June 28, 2001 6:19 AM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: RE: (ROSE) instance diagrams

Hi again,

 

I an see your point, and I do agree that for some aspects of the system (and usually during analysis) the need of object diagrams are present.

 

However, I still claim thet Rose does not support Object Diagrams. The collaboration diagram is a very poor substitute. How to you show associations in a colaboration diagram ? The "Link"-element available on the tool-pallett is not very good. What have you used ?

 

Besides, here is what the UML-spec says regarding using colaboration diagrams for mobject diagrams:

 

--- quote chapter 3.38.4 ---

 

Objects may be shown on class diagrams. The elements on collaboration diagrams are not objects, because they describe many possible objects. They are instead roles that may be held by object. Objects in class diagrams serve mainly to show examples of data structures.

-- unquote ---

 

Regards

 

Arne

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, June 27, 2001 4:24 PM
To: [EMAIL PROTECTED]
Subject: RE: (ROSE) instance diagrams

A couple of points about the Object Diagram.

First, I have to respectfully disagree with the UML 1.3 standard.  I do find object diagrams useful.  In fact, I am just finishing up a domain model where I used object diagrams to help me discover classes and some of the complex relationships between those classes.  I also use object diagrams to help me understand the multiplicity of associations when it is not obvious.

Second, Rose does support the drawing of an object diagram.  While they don't call it by that name, you can in essence draw an object diagram by drawing a collaboration diagram (or a sequence diagram, but IMHO the collaboration diagram is more flexible).  The object symbol is also available on this diagram as well.  It happens to closely resemble the class symbol, but it is in fact an object symbol.  When you display a collaboration diagram, the object symbol is included in the tool palette.

-----Original Message-----
From: Styve, Arne [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, June 27, 2001 3:29 AM
To: Olivier Chauvineau; [EMAIL PROTECTED]
Subject: RE: (ROSE) instance diagrams

Hi,

I think what you are requesting is an Object Diagram. In the UML
1.3-standard, this diagram-type is described as follows:

--- quote ----

An object diagram is a graph of instances, including objects and data
values. A static
object diagram is an instance of a class diagram; it shows a snapshot of the
detailed
state of a system at a point in time. The use of object diagrams is fairly
limited, mainly
to show examples of data structures.
Tools need not support a separate format for object diagrams. Class diagrams
can
contain objects, so a class diagram with objects and no classes is an
"object diagram."
The phrase is useful, however, to characterize a particular usage achievable
in various
ways.

--- unquote ----

I.e. a diagram showing instances of classes at a certain stage/state in your
application lifecycle.

As far as I can see, this is a diagram not supported by Rose. Neither is the
entity "Object" (instatance of a class) included as a symbol, except from in
the sequence diagram.
However, as the UML-spec states, it is not a very much used diagram type.

Regards

Arne

> -----Original Message-----
> From: Olivier Chauvineau [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, June 26, 2001 3:21 PM
> To: [EMAIL PROTECTED]
> Subject: (ROSE) instance diagrams
>
>
>
> Hi All.
>
> I modelized a system with :
>               - a class diagram : showing associations,
> inheritance links,
>               - an activity diagram : representing the activity of my
> system
>
> (and also state diagrams for some classes, but this is out of
> the scope for
> my question).
>
> Now, I would like to add some sequence diagrams to represent
> this system at
> different stages of its life (for exemple:
> SystemBeforeStepInTheFirstActivity,
> SystemAfterStepOutTheFirstActivity,
> etc...), showing interactions between different objects.
>
> For each sequence diagram, I would like to represent all the
> instances of
> all the classes involved: that is a graph of objects. it was
> my first idea,
> but I might be wrong? I think that it could bring an
> interesting view of the
> system: which classes has been instanciated? Which
> associations has been
> instanciated? How the objects are connected? etc...
>
> Thus, I want to use instance diagrams to represent all these
> objects (that
> is different instances of my class diagram): I think it is
> one a the diagram
> proposed by UML? But how can I manage this kind of diagram
> with ROSE? I
> can't find it in the menus?
>
> Is that correct to have this approach? (it is in the scope of
> a reverse
> engineering activity). Maybe, I don't need instance diagram to bring
> something more for the understanding?
> Thank you.
>
>
> >                                                            \\\///
> >
> > 
> > ( oo )                      
> >                                                            
>           (
> > .. )                         
> >
> -------------------------------------------------------m------
> m-----------
> > ---------------
> > Olivier Chauvineau
> > Analyste-programmeur, D�veloppement / Programmer Analyst,
> Development
> > Les Syst�mes Proxima Lt�e / Proxima Systems Ltd.
> >
> > T�l. :+1.514.448.4122 / T�l�c. :+1.514.875.5167
> >
> > mailto:[EMAIL PROTECTED]
> >
> >
> --------------------------------------------------------------
> ------------
> > ------------------
> >
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