Issue 1493:  Alignment with UML General (boca-rtf)
Source:  (, )
Nature:  Revision
Severity: 
Summary: Summary: Alignment with UML—General
 
 It is extremely important to understand, and thus is worth reiterating, that any proposed UML subtyping is 
 not part of BOCA.  BOCA is a model for the CORBA target, so any subtyping of UML should stay in the UML 
 space and should have a matching (and as isomorphic as possible) set of constructs in the BOCA meta-
 model.  The reason for BOCA’s existence is to ensure that, when mapping a model expressed in UML to 
 CORBA, the rich semantics of UML are not lost in the translation.
 
 As stated in issue 61, those portions of the BOCA meta-model that do not carry the baggage (not meant as 
 a pejorative term) of the legacy CORBA IDL meta-model should align as closely as possible with UML.  
 Whereever subtyping of the UML meta-model is necessary it should be specified and proposed in 
 coordination with the OAD-TF and BOCA should have (as) isomorphic (as possible) elements in its own 
 meta-model.
 

Resolution: 
Revised Text: 
Actions taken:
June 3, 1998: received issue
Discussion: 

End of Annotations:=====
*ISSUE 64*

Alignment with UML-General

It is extremely important to understand, and thus is worth
reiterating, that any proposed UML subtyping is not part of BOCA.
BOCA is a model for the CORBA target, so any subtyping of UML should
stay in the UML space and should have a matching (and as isomorphic as
possible) set of constructs in the BOCA meta-model.  The reason for
BOCA's existence is to ensure that, when mapping a model expressed in
UML to CORBA, the rich semantics of UML are not lost in the
translation.

As stated in issue 61, those portions of the BOCA meta-model that do
not carry the baggage (not meant as a pejorative term) of the legacy
CORBA IDL meta-model should align as closely as possible with UML.
Whereever subtyping of the UML meta-model is necessary it should be
specified and proposed in coordination with the OAD-TF and BOCA should
have (as) isomorphic (as possible) elements in its own meta-model.

In the past, discussions of how to align BOCA and UML have posed two
mutually-exclusive options: either subtype UML or subtype CORBA.
These choices are, in reality, not mutually exclusive.  Where a
business object construct is missing from the UML meta-model, it
should be added to UML and mapped to a similar (as isomorphic as
possible) construct in BOCA.  When the construct is already in UML, it
should be mapped to a construct in BOCA that is as isomorphic as
possible.  Again, UML and BOCA are at different levels.

These principles should be followed to the greatest extent possible as
long as they do not contradict the need for BOCA to be a proper
superset of the legacy CORBA IDL meta-model.

Recommendation: Close study of this issue, with input from OADTF and
BOCA RTF.