Issue 18791:  Improve documentation of how derived properties are calculated (uml25-ftf)
Source: Microsoft (Mr. Steve Cook, stcook(at)microsoft.com)
Nature: Uncategorized Issue
Severity: 
Summary: Summary: Clause 6.4 needs to explain that derived properties are calculated by having an operation with the same name and return type.


Resolution: 
Revised Text: 
Actions taken:
June 25, 2013: received issue
Discussion: 

End of Annotations:=====

m: Steve Cook <Steve.Cook@microsoft.com>
To: Juergen Boldt <juergen@omg.org>
CC: "uml25-ftf@omg.org" <uml25-ftf@omg.org>, "issues@omg.org" <issues@omg.org>
Subject: RE: 15668 Derived default values
Thread-Topic: 15668 Derived default values
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Date: Tue, 25 Jun 2013 09:57:56 +0000
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Juergen

 

Could we raise an issue against UML 2.5 please:

 

Title: Improve documentation of how derived properties are calculated.

Summary: Clause 6.4 needs to explain that derived properties are calculated by having an operation with the same name and return type.

 

Thanks

-- Steve

 

From: Ed Seidewitz [mailto:eseidewitz@ivarjacobson.com] 
Sent: 24 June 2013 22:24
To: Ed Willink
Cc: uml25-ftf@omg.org
Subject: RE: 15668 Derived default values

 

Ed .

 

Good point. All I could find was the following sentence in Subclause 6.4 How to Read this Specification, under the discussion of how attributes are presented in Classifier Descriptions: .Where an attribute is derived, the logic of the derivation is in most cases shown using OCL.. This is, at best, in complete and actually rather misleading, since it says nothing about the fact that you actually have to look for an operation with the same name as the attribute to find the OCL.

 

Unless I am missing something, it looks like there should be an issue about this. (I didn.t see any submitted already, and this is certainly different than 15668.)

 

-- Ed

 

From: Ed Willink [mailto:ed@willink.me.uk] 
Sent: Monday, June 24, 2013 5:49 PM
To: uml25-ftf@omg.org
Subject: Re: 15668 Derived default values

 

Hi Ed

On 24/06/2013 16:38, Ed Seidewitz wrote:

but there is no call for changing the way that the OCL is attached for derivations. 

But where is the way in which OCL is attached specified?

    Regards

        Ed Willink