W3C home > Mailing lists > Public > xml-dist-app@w3.org > September 2002

Re: Issue 302: Graph edges that do not terminate

From: Marc Hadley <marc.hadley@sun.com>
Date: Tue, 10 Sep 2002 15:53:48 -0400
Cc: Jacek Kopecky <jacek@systinet.com>, Martin Gudgin <mgudgin@microsoft.com>, XMLP Dist App <xml-dist-app@w3.org>
To: noah_mendelsohn@us.ibm.com
Message-Id: <05EEA388-C4F7-11D6-933F-0003937568DC@sun.com>

On Tuesday, Sep 10, 2002, at 15:31 US/Eastern, 
noah_mendelsohn@us.ibm.com wrote:

> You point out that RPC rules out more than a single child header.
Not header, a single child of the Body EII. That child being the 
serialized invocation or response struct (or array).

>   Where
> do we stand on encodings that span from body to header?
I don't think we say anything about that. We certainly don't prohibit 
it (AFAIK).

>   Though I
> certainly not encourage it
me either...

> , that would allow in principle for one root to
> be in a header (my X element) and another in the Body, even for RPC.
True, good point.

>   So,
> I think it's important for interop that we be clear on what is and is 
> not
> allowed, and what the interpretation of each legal form is in terms of
> graphs.  I'm still a bit vague on what the status quo is saying.  
> Thanks.
>
For RPC, the key thing is knowing where to start and I think that is 
clear in the current spec. The question of whether the resulting struct 
or array can have parts in the header I don't think we have answered. 
Prohibiting this could prove quite onerous on implementations which 
would then have to check that referenced elements are  descendents of 
the same header block or body as the referent.

For encoding in general I don't think we really need to say much more 
than we do already. Other applications of encoding may restrict its 
instantiation much as we do for use in RPC but that can be left to 
those applications.

Regards,
Marc.

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> Noah Mendelsohn                              Voice: 1-617-693-4036
> IBM Corporation                                Fax: 1-617-693-8676
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--
Marc Hadley <marc.hadley@sun.com>
XML Technology Center, Sun Microsystems.
Received on Tuesday, 10 September 2002 15:53:50 GMT

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