Re: Metamodel meeting 21 Nov.

[Karsten Riemer - Sun IR Development <Karsten.Riemer@east.sun.com>]

Jim,
Following todays metamodel meeting, as agreed, I will look at what you provided 
again, and hopefully what I sent out, and what you provided there, will be close 
enough to merge into the single layer I think we are both looking for.

-karsten

> >Date: Tue, 21 Nov 2000 11:46:41 -0600
> >From: Jim Clark <jdc-icot@lcc.net>
> >X-Accept-Language: en
> >MIME-Version: 1.0
> >To: Karsten Riemer - Sun IR Development <Karsten.Riemer@east.sun.com>
> >CC: linkage@interaccess.com, "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.
> >
> >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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> >> > >/TcAAKnr
> >>
> >> ---------------------------------------------------
> >> 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

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