Specification approach for UBL 2 SBS

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Subject: Specification approach for UBL 2 SBS




From: "G. Ken Holman" <>
To: UBL SBSC <>
Date: Thu, 06 Jul 2006 09:07:01 -0400






Fellow members of UBL SBSC,

I would like to propose to the SBSC that we as a 
group consider a different approach towards 
specifying the UBL 2 SBS than was done for the UBL 1 SBS.

As you recall, we specified UBL 1 SBS exclusively 
through XPath files that catalogued the information items in the subset.

In the development of UBL 2 there has been 
feedback regarding the perceived necessity, let 
alone convenience, to some of having schema 
expressions of the subset.  This would be a set 
of schemas for the same namespace but specifying 
a lesser set of optional constructs, just as was 
specified by the XPath files, but doing so using XSD.

I've posted some thoughts of mine regarding UBL customization approaches here:

   http://lists.oasis-open.org/archives/ubl/200606/msg00109.html

Please let me know your thoughts about treating 
UBL 2 SBS as a UBL customization effort such that 
we produce an SBS set of schemata, as described 
in chapter 8 of that paper referenced above.  As 
I've indicated in that paper, I propose using 
XPath files to conclusively prove through 
exhaustive enumeration that each and every 
possible information item and cardinality of the 
SBS schemata is an information item allowed in 
UBL.  I don't see the SBS needing any extension 
elements, only needing to elide optional elements.

Because of the push for code lists and other UBL 
2 issues (and writing my UBL tutorial) I have yet 
to write the code utilizing XPath files to prove 
the exhaustive enumeration, but this is high on 
my "to do" list once we get into UBL 2 review.

Nevertheless, I thought it important that we 
should start talking about UBL 2 SBS now in order 
to get ideas on the table for 
consideration.  Hopefully for UBL 2 SBS we would 
be able to subset the common library expressions 
and each of the document types such that we have 
a single suite of XSD expressions of the 
normative subset of UBL 2 that is the Small Business Subset.

Please let me know what you think.

. . . . . . . . . . . . Ken

--
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