OpenID delegate tag in the Yadis/XRDS file

David Recordon david at
Sat Apr 8 20:46:20 UTC 2006

I see no reason why it wouldn't be optional just as it currently is in
the OpenID 1.1 spec.


-----Original Message-----
From: yadis-bounces at
[mailto:yadis-bounces at] On Behalf Of Johannes Ernst
Sent: Friday, April 07, 2006 4:13 PM
To: Yadis list
Subject: OpenID delegate tag in the Yadis/XRDS file

For the OpenID 1.2 spec, I'd like to propose to clearly mark this tag  
as optional, just like it is optional in the (non-Yadis) OpenID spec.

The same algorithm would apply in determining which OpenID URL should  
be used at the Relying Party.

The advantage of that is that a large identity server could, if it  
wanted to, have a single X-XRDS-Location for all of the hosted  
identities, as long as they all support the same services (which is  
somewhat likely for all identities on the single host). This would  
help with caching and efficiency.

Johannes Ernst
NetMesh Inc.

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