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A couple of versioning personal blog entries

From: David Orchard <dorchard@bea.com>
Date: Thu, 13 Dec 2007 08:53:35 -0800
Message-ID: <BEBB9CBE66B372469E93FFDE3EDC493E0126413C@repbex01.amer.bea.com>
To: <www-tag@w3.org>
I wrote up a couple of personal blog entries on validation by
projection.  This seems to be a useful way of achieving forwards and
backwards compatibility without relying upon schemas that have wildcards
or open content models.
>From the TAG's definitional perspective, I'd characterize validation by
projection as an architecture where the schema(s) define a Defined Text
Set and an Accept Text Set that is equal to the Defined Text Set, then
the process of projection is the creation and validation of the text
against a generated Accept Text Set that has the original Accept Text
Set plus all possible extra undefined elements and attributes.  It could
also be said that a system with validation by projection has an Accept
Text Set that contains the Defined Text Set plus all possible extra
undefined elements and attributes, and validition is done by generating
a new text by taking the original text and removing all the extra
undefined elements and attributes then applying validation.  I'm not
sure which way I like better.  Of some note, I list Henry's V2S and UBL
in the implementations.
If any of this material was to go anywhere in the finding works, I'd say
in the compatibility strategies work.  But I don't think we currently
have the collective energy to be adding material to the versioning
documents.  Your thoughts?
Received on Thursday, 13 December 2007 16:53:58 UTC

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