Re: Metamodel meeting 21 Nov.

[Jim Clark <jdc-icot@lcc.net>]

Kasten,

What I provided is a simplified view or profile into the metamodel that reflected
the nominal set of parameters from the metamodel in order to implement or execute a
business transaction within a business collaboration. Your characterization of the
model I provide and the constraints on it are misstated.

Jim

Karsten Riemer - Sun IR Development wrote:

> Bob,
> as you said, you weren't at Tokyo, and you haven't seen the latest model,
> so I would prefer to defer any further discussion on your comments until you
> have seen and understood the Tokyo model.
>
> As to the goal you stated: to provide a straightforward mapping from the
> existing metamodel to a single layer that drives the runtime software. We
> provide that.
>
> Jim Clark, to my knowledge, never provided a simplified runtime model. He
> provided an XML mapping that would require users to create pointers to the
> various places in the 4 layers that are required for TP. That would again
> require a user to first construct the 4 layers, and then create the pointers to
> them. That is the part that must be optional. You should have a clear choice of
> whether you want to create your model by guided steps through the 4 layers, or
> by specifying it directly in the single layer, i.e. in the specification
> metamodel.
>
> I never said that the "methodology metamodel" is superfluous. It is needed for
> the people that want the guided tour through the 4 layers. The "specification
> metamodel" is needed for people who don't, or who have already established their
> models and just need to convert it to the ebXML format.
>
> -karsten
>
> > >From: Bob Haugen <linkage@interaccess.com>
> > >To: "'Karsten Riemer'" <Karsten.Riemer@east.sun.com>, Jim Clark
> <jdc-icot@lcc.net>
> > >Cc: "ebxml-bp@lists.ebxml.org" <ebxml-bp@lists.ebxml.org>,
> "ebxml-cc@lists.ebxml.org" <ebxml-cc@lists.ebxml.org>, "cory-c@dataaccess.com"
> <cory-c@dataaccess.com>, "alonjon@mega.com" <alonjon@mega.com>
> > >Subject: RE: Metamodel meeting 21 Nov.
> > >Date: Tue, 21 Nov 2000 07:34:29 -0600
> > >MIME-Version: 1.0
> > >
> > ><Karsten Riemer>
> > >A response to Jim Clark's e-mail on this topic:
> > >We are not defining a new metamodel
> > ></Karsten Riemer>
> > >
> > >Karsten, here are some reasons why some of us think it is
> > >a new metamodel:
> > >
> > >1. The first couple of versions had significant differences
> > >    from any reasonable derivation of the current metamodel:
> > >    * different method of sequencing
> > >    * different way of modeling recursive processes
> > >    * missing concepts (that should have been there)
> > >    * in other words, not what one would get in a straightforward
> > >      derivation of the current metamodel.
> > >    I was not in Tokyo and have not seen your current version,
> > >    so maybe these problems were resolved.  But they made
> > >    your metamodel different from a design standpoint, so as
> > >    to require a complex mapping rather than a simple one,
> > >    and block some potentials of the current metamodel
> > >    from being expressed (or at least I could not figure out
> > >    how to express them).
> > >
> > >2. As Tony Weida pointed out, your terminology ("specification
> > >   metamodel") and positioning comments made it seem like yours
> > >   was the specification and the existing metamodel was superfluous
> > >   and optional.
> > >   This is a problem because a lot of other work (e.g. Common
> > >   Business Processes and what I am doing with the Economic
> > >   Elements) is based on the current metamodel.
> > >
> > >A question:  Jim Clark also provided a simplified runtime model,
> > >that was a straightforward derivation from the current metamodel.
> > >What happened with that model in Tokyo? Was it ignored?
> > >
> > >-Bob Haugen------ =_NextPart_000_01C0538D.8D179140
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>
> ---------------------------------------------------
> Karsten Riemer,
> Director, Information Architecture,
> Enterprise Management Architecture Group
> Sun Microsystems Inc.,
> MailStop UBUR03-313
> 1 Network Drive,
> Burlington, MA 01803-0903
>
> ph. 781-442-2679
> fax 781-442-1599
> e-mail karsten.riemer@sun.com
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