Re: [cmis] Nikunj's blog postings on AtomPub vs CMIS

[Al Brown <albertcbrown@us.ibm.com>]

The Atom and APP xsds are valid xsd - e.g., stuff they produce works against the feed validator. There is a technical issue in crafting the extensions for CMIS in the places where atom/app say it can be extended to allow for other extensions. xs;any was designed more to be used in a scenario where all the definitions are in a single xsd rather than a collection of them.

Having the XSDs help with JAXB. Otherwise, a provider or client needs to leverage abdera, or their own parser to create java objects to interact with. An implementer can always provide their own Atom/APP xsd's for use with CMIS. Providing it saves them effort.

The question is parsing generic atom. With the atom.xsd provided, a provider would try to parse, fail (due to missing cmis:terminator), then have to load using abdera or something else.

-Al

Al Brown
Emerging Standards and Industry Frameworks
CMIS: https://w3.tap.ibm.com/w3ki07/display/ECMCMIS/Home
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Julian Reschke ---05/13/2009 01:04:32 PM---Ryan Mcveigh wrote:

From:	Julian Reschke <julian.reschke@greenbytes.de>
To:	Ryan Mcveigh <ryan.mcveigh@oracle.com>
Cc:	Choy_David@emc.com, julian.reschke@greenbytes.de, Al Brown/Costa Mesa/IBM@IBMUS, david.caruana@alfresco.com, cmis@lists.oasis-open.org
Date:	05/13/2009 01:04 PM
Subject:	Re: [cmis] Nikunj's blog postings on AtomPub vs CMIS

---

Ryan Mcveigh wrote:
> Isn't there value in the XSD for things like JAXB?
> ...

In theory, yes. In practice, *if* it this means that an implementation 
using that fails to be a conformant AtomPub client/server, no.

Note the emphasis on *if* -- we will have to investigate this. My 
understanding is that you can't really use XSD to describe Atom's 
extensibility model defined in Section 6 of RFC 4287 
(<http://greenbytes.de/tech/webdav/rfc4287.html#rfc.section.6>).

BR, Julian

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