Re: navigable vs. exposed by reference



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From: Steffen Zschaler (sz9@inf.tu-dresden.de)
Date: Mon 26 Jan 2004 - 15:32:20 GMT


Hi Hans,

This is in fact a compliance point for OCL 2.0. See ptc/2003-10-14, p. 1.

Steffen

SainTiss schrieb:

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>Hi,
>
>if I understand correctly, there is a difference in the UML metamodel between 
>a navigable associationEnd, and one which is exposed by a reference. Does 
>this difference exist at the modeling level already, or only at code level 
>(e.g. JMI interfaces)?
>I looked at the UML standard, but couldn't find anything about it... As far as 
>I can see, all associations in the UML metamodel can be navigated 
>bidirectionally and so I assume that they are also exposed by a reference at 
>both ends.
>
>Is this correct? If not, are OCL constraints allowed to use non-exposed 
>association-ends, and is this documented somewhere?
>
>Thanks in advance,
>
>Hans Schippers
>
>
>- -- 
>Ark Linux - Linux for the Masses (http://arklinux.org)
>
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>
>Hans Schippers
>2LIC INF
>UA 2003-2004
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-- 
Dipl.-Inf. Steffen Zschaler
Research Assistant

Dresden University of Technology
Department of Computer Science

Phone +49 351 463 38555
Fax   +49 351 463 38459
Email Steffen.Zschaler@inf.tu-dresden.de

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