Re: [regrep] Issue with UUID's for Core Components and BIE's

["David RR Webber" <david@drrw.info>]

Carl,

You raise an interesting another point.  In BCM we talk about
domains, communities of interest and then authoritive sources.

Such an authority clearly has to be responsible for managing the
UID values within their domain.

Using my example - the USPS is managing the semantics
around their address formats.  Then this can be crosswalked
to the international authority - the UPU - and their UID set,
and similarly the OASIS CIQ too.

However - you expect that domain analysts can work
offline - and then later upload or share their work with
both RR servers and co-workers.   This is another
critical value - that avoids the need for an RR in order
to be able to do CCTS.  If you use UUID - you are almost
mandating that people have to do this with RR - and that
clearly breaks the ebXML need for components to be
self-sufficient.

The good news is - by decoupling away from UUID values
and using UID as the reference - any registry can happily
import those definitions and assign it own local UUID internal
keys to those entries - without breaking anything.

Also - by using the UID - you can track groups of related
definitions ( query on "USPS0201*" ) and so on - and
versions and sub-versions (query on "USPS020120:*") -
which is not possible in a UUID based system.

Notice also that if you want to use something like UDEF id
in addition - or in place of the 6 digit UID - this also
works - for the same reasons - the authoritative source
creates the UDEF ids and these then become the domain
reference system.

All these behaviours and more is why the reference system
for the semantic building blocks should be using the UID
tied to the registry RIM external ID as the foundation.

Thanks, DW.

----- Original Message ----- 
From: "Carl Mattocks" <carlmattocks@checkmi.com>
To: "Chiusano Joseph" <chiusano_joseph@bah.com>
Cc: "Duane Nickull" <dnickull@adobe.com>; <regrep@lists.oasis-open.org>
Sent: Friday, April 09, 2004 11:07 AM
Subject: Re: [regrep] Issue with UUID's for Core Components and BIE's


>
> <quote who="Chiusano Joseph">
> > Duane Nickull wrote:
> >>
> >> Apologize for the cross post in advance, but I feel both of these
groups
> >> need to address this issue.
> >>
> >> The Core Components and Registry specs both mandate a unique identifier
> >> to be used in certain places.  IN the registry, it is for every single
> >> registry object.  Each Core Component also must have an identifier.
> >> There were some questions however that do need further discussion IMO.
> >>
> >> 1. Should a BIE carry the same UUID as the Core Component it was
derived
> >> from?
> >
> > IMHO, no. They are 2 distinct entities.
>
> Agreed
>
> >
> >> 2. Either in addition to, or alternatively to #1, should a BIE carry
> >> its' own unique UUID?  If it is placed into a registry, the UUID will
> > Yes - and we may want to explore the possibility of a BIE's UUID being
> > somehow related to its "base" Core Component's UUID - perhaps by
> > reflecting a part of the Core Component's UUID within the BIE's UUID
> > somehow. But on the other hand this might be too heavyweight...
>
> imho this is too cumbersome
>
>
> >> be
> >> assigned to it by the registry, but it also need to be serialized
inline
> >> into the BIE to be used outside of the registry or in places where
> >> access to the Registry RIM instance data is not possible. (real world
> >> use cases exist for this).
>
> I think this is the crux of the problem that DW referred too. Once the RR
> generated contructs are used outside of the RR the urn + uuid +
> associations may have liitle relevance. Most likely a new set of 'locally
> generated' (non RR compliant) identifiers will be imposed.  Which creates
> a synchronization nightmare if a round-trip is ever attempted. OMG folk
> spent a lot of time developing XMI to address this need.
>
>
>
> >> 3. If the BIE does have to have it's own UUID, possibly in addition to
> >> the COre COmponents UUID, should this UUID be in the 128 bit algorithm

> >> format OR should it use something akin to the UDEF format that can
> >> convey context variables?  This may be crucial to aid business mappers
> >> and integration software (rich client applications) to map the BIE to
> >> existing data sources.
>
> agreed on URN + UUID . Additional (extrinsic ?) identifiers can be added
> as required.
>
>
> -- 
> Carl Mattocks
>
> co-Chair OASIS (ISO/TS 15000) ebXMLRegistry Semantic Content SC
> CEO CHECKMi
> v/f (usa) 908 322 8715
> www.CHECKMi.com
> Semantically Smart Compendiums
> (AOL) IM CarlCHECKMi
>
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