Issue 6002: relationship should just be a cross-reference (uml2-rtf)
Source:  (, )
Nature: Clarification
Severity: Critical
Summary: There is no clear relationship between NamedElement, TypedElement and Type as defined in Core::Basic and items by the same name in Core::Abstractions::Namespaces and Core::Abstractions::TypedElements. There is no reference between the two although the concepts seem identical. 

It seems like the relationship should just be a cross-reference. However, is it a type-instance relationship? Or is a refinement relationship (as can be seen in other parts of the spec)? Or is it something else? What is going on here?

Resolution: closed no change
Revised Text: 
Actions taken:
July 19, 2003: received issue
February 18, 2005: moved from infrastructure
August 23, 2006: closed issue
Discussion: 
It was an explicit design decision to split off the Abstractions hierarchy from the part of
the Infrastructure that supports the UML and MOF modeling languages. The general idea
behind the Abstractions concepts is to provide a potentially useful “grab-bag” of
metamodeling patterns that might prove useful some day in as yet unknown modeling
languages. On the other hand, the Basic and Constructs packages are specifically
designed to support the MOF and UML languages. The separation is intended to ensure
that MOF and UML remain unaffected by the needs of future modeling languages.
End of Annotations:=====
From: webmaster@omg.org 
Date: 19 Jul 2003 09:24:54 -0400 
To: <juergen@omg.org> 
Subject: Issue/Bug Report 


--------------------------------------------------------------------------------

Name: Steve Hickman 
Company: self 
mailFrom: shickman@ieee.org 
Notification: Yes 
Specification: UML 2.0 Infrastructure 
Section: Chapter 4 
FormalNumber: ad/03-03-01) 
Version: Third Revision 
RevisionDate: 03-01-03 
Page: 76-77 
Nature: Clarification 
Severity: Critical 
HTTP User Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0; T312461; Guidant IE5 09302001 Win2000 Distribution; .NET CLR 1.0.3705) 
Description
There is no clear relationship between NamedElement, TypedElement and Type as defined in Core::Basic and items by the same name in Core::Abstractions::Namespaces and Core::Abstractions::TypedElements. There is no reference between the two although the concepts seem identical. 

It seems like the relationship should just be a cross-reference. However, is it a type-instance relationship? Or is a refinement relationship (as can be seen in other parts of the spec)? Or is it something else? What is going on here?