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entity-resolution message

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Subject: Re: [entity-resolution] Spec comments to process


** Reply to message from Normand_Montour@lgs.com on Wed, 20 Aug 2003 09:28:38
-0400

> Norm,
>    about point no. 2 in the technical area (schema):  My thoughts would be
> that
> at least the DTD and the W3C Schema should be normative, but not exclusive
> of any other one...

My concern about this is that it can be hard to normatively guarantee that a
DTD and Schema will validate all documents exactly the same way.  Our spec
probably has fewer problems than others in this regard, but the question
remains - if the DTD and Schema return different validation results, which one
is correct?  This is not an easy issue.  In pure marketshare terms, I think XML
Schema would be the way to go.  However, in terms of who is interested in
XCatalogs, I think the document community takes a bigger interest than does the
data community.  Document people seem to prefer DTDs (with RELAX NG perhaps
being the logical successor, particularly in an OASIS context).

That said, if XCatalogs relied on RELAX NG, I wouldn't be able to deploy them
on any project I work on.  Also, as I remember, we decided that schemata of any
form were not necessary for XCatalogs, just useful for some users.  In that
case, I would suggest doing DTD and XML Schema and RELAX NG, *none* of which
are normative.  Any takers?

	Cheers,
		Tony.
====
Anthony B. Coates
London Market Systems Limited
33 Throgmorton Street, London, EC2N 2BR 
http://www.londonmarketsystems.com/
mailto:abcoates@londonmarketsystems.com
Mobile/Cell: +44 (79) 0543 9026
[MDDL Editor (Market Data Definition Language), http://www.mddl.org/]
[FpML Arch WG Member (Financial Products Markup Language), http://www.fpml.org/]
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