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Subject: Re: [ubl] Namespace URI string implications
From: "G. Ken Holman" <>
To: "Universal Business Language" <>
Date: Tue, 06 Jun 2006 08:16:59 -0400
At 2006-06-06 11:43 +0200, wrote:
>my name is Roberto Cisternino (ITLSC chair).
>I woult like to give my opinion about this matter.
Thank you!
>One of the main reasons UBL is better than past EDI formats is the
>validation which is made possible using a precise WXS Schema based on
>unique namespaces aware of UBL versions.
>
>e.g. urn:oasis:names:specification:ubl:schema:xsd:Invoice-1.0
>
>I think an UBL document "instance" should be based on a precise namespace
>URI, then inside the schema there could be a sofisticated re-use of
>components by choosing from 1 or more component collections still
>versioned and identified by a precise namespaceURI.
Do you have a comment regarding only using a new precise namespace
for those information items that are subsequently added to a document model?
>In a different way I think it could be hard or impossible to make generic
>software able to deal with different UBL versions and to transform them
>successfully in case of a technology update.
I have done this in a complete stylesheet of fifteen XSLT
instructions (which includes error checking!). An example is in the
paper I am preparing.
>Maybe there could be a sort of deprecation system, this way an UBL 2.0
>interface could be able to read UBL 1.0 automatically by following
>deprecation instructions... just an idea (could be heavy)
I believe it would not be heavy if we base the deprecation on the
simple concept of the namespace of an information item.
>We had versions using EDIFact or X12 but the translation between versions
>was hard as documents were often invalid.
I believe this would not be the case for namespace-based processing.
>XSLT transformation is a possibility, but maybe a free UBL update service
>(web service) could be a "must".
I'm glad you would be willing to consider XSLT and I hope that you
find the descriptions in my paper of value. The filtering stylesheet
would be supplied by UBL as part of a support package or even along
with the schemas. More detail is coming in the paper.
. . . . . . . . . . . Ken
--
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