That seems a pretty good summary to me.

About the Process View:

I just created a model based on the RUP template and the Process View
package is visible under Logical View \ Design Model. It contains a Process
View diagram plus the Process Name class <<process>> and Thread Name class
<<threads>>. But it's certainly not a top level package.

Mark Williams
Configuration Manager
MMT Computing (Energy) Ltd
Ipswich, UK


-----Original Message-----
From: English, Art [mailto:[EMAIL PROTECTED]]
Sent: 03 May 2002 15:52
To: '[EMAIL PROTECTED]'; '[EMAIL PROTECTED]'; Rossomando, Philip
Subject: (RUP) The 4+1 View Model of Architecture


I have been having difficulty understanding the 4+1 View Model, so I decided
to dig into it more today and I feel that I have reached an understanding,
but I also feel that Rational should alleviate the confusion around the 4+1
View Model by making this concept more clear within Rational Rose.
 
Let's start by creating a new model in Rose using the RUP template. Rose
creates four views: Use Case, Logical, Component, and Deployment
 
The 4+1 Architecture starts with the "Use Case View" that drives the four
other views. The Use Case View describes hat the system should do. OK. This
is the first view defined in the Rose model that uses the RUP Template.
 
The next view in the 4+1 View Model is the "Logical View."  This view
contains the Analysis Model and the Design Model. This is OK too. The Rose
model still matches up to the 4+1 Architecture.
 
Now we have the Process View in the 4+1 View Model. This view is missing
from the Rose model based upon the RUP template. Since I cannot create a new
top-level package in Rose (I don't know why this limitation exists. Is there
a way around it?), the RUP Tool Mentor for Documenting the Process View in
Rational Rose suggest that I create a package in the Logical View of the
Rose model and call it the Process View. After creating the process view, I
can create class diagrams where classes are stereotyped <<process>> and
<<thread>> to add some meat to the process view. I can show how <<process>>
and <<thread>> classes are associated with each other in class diagrams-as
well as show how they interact in sequence diagrams.
 
Why doesn't the RUP template contain a top-level package for Process View?
Why can't I create a top-level package myself in this model for Process
View?
 
The next view in the 4+1 View Model is the "Implementation View."  In the
Rose model based upon the RUP template it is named the "Component View." In
the RUP Tool Mentor, Structuring the Implementation Model Using Rational
Rose it tells us to put the Implementation Model in the Component View. The
Tool Mentor does not mention the Implementation View. Personally I think we
should change the Rose model based upon the RUP template and make "Component
View" the "Implementation View" or vice versa. I would just like the names
to match.
 
The last view in the 4+1 View Model is the "Deployment View." This View
matches up in both the 4+1 View Model and the Rose model based upon the RUP
template. My only complaint here is why not make this View a package so I
can create more than one deployment diagram. This is really a very serious
limitation. Also, I know XDE supports putting components in nodes, but Rose
does not. This is another limitation that should be fixed.
 
If I am inaccurate in any way, please correct me. My goal is to achieve a
full understanding of the 4+1 View Model and additionally how it maps to
Rational Rose.
 
Thanks,
 
Art.
 
Arthur English
Research Director, Technology and Architecture
Global Industries
 
Unisys Corporation
One Unisys Way
Blue Bell, PA 19424
 
(  (215) 986-5712
Mobile: (610) 805-0183
Net:  423-5712
eMail: [EMAIL PROTECTED]
 
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