[OpenID] XRI for OP Identifier?

[Jean-Noel Colin]

Hi

I have a question regarding the use of XRI as OP Identifier. The specs  
(2.0) mention that whenever an XRI is used as the (user-supplied)  
Identifier, the XRDS document retrieved MUST include a canonicalId,  
which is to be used as the claimed identifier.

As a consequence, this means that XRI can not be used as OP  
Identifier, otherwise, what would be the value of the canonicalId? So  
does this mean that OP Identifier can only be URI that are resolvable  
using Yadis (since HTML Resolution is only allowed for user  
Identifiers)?

Thanks for clarifying this

Best regards

Jean-Noel Colin