OH YEAH, I have heard of that ;-)
But I have never used one. All of my Use Cases do attach to actors
or are extended/included from a Use Case that is.
When you extend/include a use case then almost by definition the
exending/including use case is NOT complete and can NOT stand by
itself. If a use case is including another use case then it also
is not complete.
HHmmm... interesting. I think I will go read some more on this.
Thanks for the pointer.
Eric
-----Original Message-----
From: Williamson, Rusty [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 21, 2001 12:42 PM
To: 'Aker, Eric'; 'Rose Forum'
Subject: RE: (ROSE) UML question number one --found RUP's answer...
Eric,
Original question:
Does anyone know if there is any kind of requirement that use cases in
extent and include relationships must always be abstract use cases?
You teach a Rational OOA&D class and you do not know what an abstract use
case is? I don't know what to say to that. An abstract use case is one
that is not complete - can not stand by itself and can not be connected to
an actor (versus a concrete use case which is always connected to an actor).
This definition (I paraphrased of course) can be found in the OMG UML Spec,
all of the 3-A's books on UML and UP as well as just about every use case
book I've read. I'm sure your going to shake your head and go 'oh yeah...'.
Anyway I found the answer to my question... I guess. Interestingly I
searched the OMG specification and also the 3-A's UML Reference and User
Guide and could not find anything on my particular question. Maybe I just
missed it. Also, so far, replies from the industry (this forum, newsgroups,
cafes) all say 'unknown' or 'not that I know of'.
However, in the RUP eCoach (i.e. the web pages that describe RUP), in the
sections on:
* Guidelines: Include Relationship
* Guidelines: Extend Relationship
It states that:
* Included use cases are 'always' abstract
* Extended use cases 'may be' abstract
Hmm... is that really the 'standard'? I guess that it makes sense based on
the strict definitions (although it's going to change some of what we've
done). Live and learn...
Thanks!
Rusty
---------------------------------------------------------------
Rusty Williamson
Sr. Systems Architect
Corporate Office
GERS, Inc.
10431 Wateridge Circle * San Diego, CA 92121
(800) 854-2263 * CA (858) 457-3888
FAX (858) 484-9237 * Desk (858) 484-9237
E-mail: [EMAIL PROTECTED] * Web http://www.gers.com
"e-Business Solutions for the Consumer-Driven World"
-----Original Message-----
From: Aker, Eric [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 21, 2001 11:00 AM
To: 'Williamson, Rusty'; 'Rose Forum'
Subject: RE: (ROSE) UML question number one
No there is not.
What is a "abstract use case"?
I know what an abstract class is.
Eric Aker
-----Original Message-----
From: Williamson, Rusty [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 21, 2001 10:14 AM
To: 'Rose Forum'
Subject: (ROSE) UML question number one
Hello,
Does anyone know if there is any kind of requirement that use cases in
extent and include relationships must always be abstract use cases?
Thanks!
Rusty
---------------------------------------------------------------
Rusty Williamson
Sr. Systems Architect
Corporate Office
GERS, Inc.
10431 Wateridge Circle * San Diego, CA 92121
(800) 854-2263 * CA (858) 457-3888
FAX (858) 484-9237 * Desk (858) 484-9237
E-mail: [EMAIL PROTECTED] * Web http://www.gers.com
"e-Business Solutions for the Consumer-Driven World"
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