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Re: HTTP Header Precedence

From: Dan Connolly <connolly@w3.org>
Date: Tue, 06 Feb 2007 08:17:19 -0600
To: Ian Davis <Ian.Davis@talis.com>
Cc: public-grddl-wg@w3.org
Message-Id: <1170771439.7497.231.camel@dirk>

On Tue, 2007-02-06 at 09:45 +0000, Ian Davis wrote:
> I couldn't see this in the GRDDL spec, but I've looked so hard perhaps
> I'm blind to it. My assumption is that a client is licensed to apply all
> or none of the GRDDL transformations it can discover.

Yes... the relevant rule is:

"If F and G are GRDDL results of IR, then the merge [RDF-MT] of F and G
is also a GRDDL result of IR"
 -- http://www.w3.org/2004/01/rdxh/spec#grddl-xml

>  This has to be
> true because there may be transformation procedures that a given client
> is not capable of performing, e.g. javascript.
> So the HTTP header is just another transformation that may or may not be
> performed by the client. However if the header is present the client
> should make an attempt to process it in the same way it would if the
> transformation were in a link element or the namespace document.
> Is this correct?

Sounds right.

Dan Connolly, W3C http://www.w3.org/People/Connolly/
D3C2 887B 0F92 6005 C541  0875 0F91 96DE 6E52 C29E
Received on Tuesday, 6 February 2007 14:17:25 UTC

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