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Subject: Re: [xri] Removing ds elements from schema (was: OpenID Delegatingrelationship in XRD)

I can live without the extension wrapper if we have a better way.

I think recommending having the signature at the top for streaming  
applications is sufficient.

I don't think it makes any real difference to most parsers.

The best way to limit it to one is the question.

John B.
On 2009-09-08, at 12:19 PM, Scott Cantor wrote:

> Will Norris wrote on 2009-09-08:
>> I'm actually really interested in pursuing this a bit more as well.
>> It would allow us to use the original content model we had, but in a
>> way that works with XSD.  Interestingly, if we don't include the ds:*
>> elements as part of the XRD schema, it would solve the problem we had
>> with RelaxNG since there is no longer a schema dependence on XML
>> DSig.  (Not that I'm necessarily advocating a switch back to RelaxNG
>> at this point).
> Sorry I didn't think of it originally. I imagine it wouldn't be all  
> that
> hard to get one written based on the original one.
>> The other big question is the placement of ds:Signature.  I  
>> completely
>> understand Scott's argument for placing it higher up in the document.
>> This change we're discussing would mean that the Signature could now
>> appear anywhere in the document.  Scott, how much of a concern is  
>> this
>> really?
> It's not only that, it's also limiting the number to one. While it  
> sometimes
> comes up to support multiple signatures, that's somewhat complex in  
> practice
> (because of signature ordering).
>> The idea of placing it higher is so that XML processors would
>> know early on if they needed to be doing canonicalization.  How many
>> processors actually alter their behavior in the presence of the
>> Signature element in this way?
> It's for streaming implementations.
>> I'm fairly certain the Java version of
>> XML-Tooling does not.  How about the C version?
> We're exclusively DOM-based, so we don't care.
>> We could always
>> recommend that XRD providers place the Signature element higher up in
>> the document.
> True.
> -- Scott
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