[OpenID] RP Yadis Discovery and OpenID versions

[Martin Atkins]

Shane B Weeden wrote:
> 
> I have a question about how an OpenID RP should behave when performing 
> Yadis discovery. In this scenario, the OpenID RP supports both OpenID 
> 2.0 and 1.1 authentication protocols.
> 
> If the XRDS document contains services for both OpenID 2.0 and 1.1, and 
> the 1.1 service has a higher priority (i.e. lower priority value), which 
> service should the RP choose? Is this covered by any existing 
> specification?
> 
[snip]
> 
> 1. Services that prefers OpenID 2.0 services over 1.1 regardless of 
> priority:
> www.plaxo.com
> nerdbank.org/RP
> 
> 2. Services that use the service priority rather than perferring OpenID 
> 2.0.
> jyte.com
> openidenabled.com (php, python and ruby)
> 

FWIW, the Net::OpenID::Consumer perl library (openid2 branch) currently 
prefers 2.0 over 1.1 and only uses priority within each. 1.1 is 
considered to be a last-ditch attempt to get something working, not a 
useful option.