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RE: Scope of NIM



Title: RE: Scope of NIM

I certainly agree with these points.

-Walter

> -----Original Message-----
> From: Andrea Westerinen [mailto:andreaw@cisco.com]
> Sent: Wednesday, August 23, 2000 2:33 PM
> To: Avri Doria; nim@ops.ietf.org
> Subject: RE: Scope of NIM
>
>
> I am alittle confused by this line of reasoning, and think
> that both sides
> are right.  Here is my take:
>
> 1.  I agree that SMI/SPPI/SMIng are all ways to represent data.
> 2.  Two issues are the capabilities and expressiveness of these
> representations.
>       IMHO, we need to be careful to create clear semantics.
> For example, imagine
>       a "relationship with data".  It is a very good thing
> for your info
>       model to be clear about this semantic to avoid confusion.
> 3.  The models currently worked in SMI/SPPI are indeed
> protocol-specific
>       and fall under the "data model" definition.
>
> Andrea
>
> -----Original Message-----
> From: owner-nim@ops.ietf.org
> [mailto:owner-nim@ops.ietf.org]On Behalf Of
> Avri Doria
> Sent: Wednesday, August 23, 2000 6:43 AM
> To: nim@ops.ietf.org
> Subject: Re: Scope of NIM
>
>
>
>
> "Weiss, Walter" wrote:
> >
> > > > > Therefore, I suggest that in the aftermath of the NIM
> > > BOF, the topic
> > > > > which this mailing-list has to consider is what to do about an
> > > > > Information Model.
> > > >
> > > > If the objective is to create an information model based on
> > > the superset of
> > > > SMI (SPPI) or SMIng, I would agree with you.
> > >
> > > Your "if statement" makes no sense to me, since the oft-repeated
> > > definition of "information model" says that it is
> independent of the
> >
> > > data models like SMI/SPPI/SMIng.
> > >
> > SMI/SPPI/SMIng is not a data model or an information model. It is a
> > language for specifying structures. To the extent that it supports
> > multiple distinct protocols, it is also an information modeling
> > language.
>
>
> I am glad you brought this up.
>
> I have for a while been confused about the arguments that the
> SMI/SPPI/SMIng constituted a data model.  While it is true that
> these can be used to derive a data model, I too believe that they
> express the structure of the information model and do not determine
> the data model in the same way that a LDAP expression would.  Both
> in agents and in management systems I have worked on, I have never
> had the structure of the MIB or PIB determine the way in which the
> data was handled internally.
>
> a.
>
>
>