I'm sure that the data is wildly out of date, but at the time the SREG
fields 
(http://openid.net/specs/openid-simple-registration-extension-1_0.html#response_format)
were based on looking at what a few hundred different sites were
asking for.

I unscientifically think that the extremely common stuff is:
 - Name
 - Avatar / photo
 - Email address

Scientifically, we should actually put some effort into looking at
sign in pages again. :)

--David

On Tue, Dec 8, 2009 at 7:59 PM, Jonathan Coffman
<[email protected]> wrote:
> Out of curiosity, beyond the email discussion below what are the primary
> metadata needs around the other major (PoCo) fields?
> Speaking to the use-cases I work off of here at PBS, I'm primarily concerned
> about emails being verified (and a signup date is also useful) and am most
> inclined to trust the OP (especially if it were a white-listed or otherwise
> vetted iDP).
> Jonathan
>
> On Dec 8, 2009, at 2:17 PM, Chris Messina wrote:
>
> Is it worth looking at how Facebook handles the passing of profile data? Or
> is their architecture/use case different?
>
> http://wiki.developers.facebook.com/index.php/Users.getInfo
> On Tue, Dec 8, 2009 at 11:08 AM, Breno de Medeiros <[email protected]> wrote:
>>
>> On Tue, Dec 8, 2009 at 11:01 AM, John Panzer <[email protected]> wrote:
>> > For "one-time" URLs, you'd probably want to allow for retries for a
>> > short
>> > period (or just allow it to be accessed for say 5m) which would have
>> > approximately the same level of protection.
>> > You could also imagine long-lived capabilities along the lines of OAuth
>> > tokens that allow RPs to repeatedly refresh the data as needed.  (Better
>> > of
>> > course if they can subscribe to changes, but that's an implementation
>> > detail
>> > and definitely a separate spec.)
>> > Given that AX already supports requesting URL-valued data (e.g., profile
>> > photos) I think this just comes down to defining a fairly complicated
>> > data
>> > type for AX and passing a URL around.
>>
>> A more lightweight alternative is to adopt an 'artifact' mode where
>> most of the OpenID assertion (request and response) can be passed in
>> the backchannel. That is a bit more difficult to implement but easier
>> to spec (because the existing URLs can be used) and more general
>> (compacts all extensions, not only AX).
>>
>> > --
>> > John Panzer / Google
>> > [email protected] / abstractioneer.org / @jpanzer
>> >
>> >
>> >
>> > On Tue, Dec 8, 2009 at 10:57 AM, Peter Watkins <[email protected]> wrote:
>> >>
>> >> On Tue, Dec 08, 2009 at 10:32:12AM -0800, John Panzer wrote:
>> >>
>> >> > provide to RPs.  If you send an endpoint URL to the RP instead of the
>> >> > information itself, the RP can then retrieve it via a backchannel
>> >> > (and
>> >> > cache
>> >> > it).  If you have private data, use a capability URL with a token
>> >> > that
>> >> > allows read-only access.
>> >>
>> >> Exactly. OpenID requests and responses are very chatty, and backchannel
>> >> URLs could be an easy way to get around the 2k GET limit (the cost of
>> >> course being additional time needed to make the additional HTTP
>> >> requests).
>> >>
>> >> I don't see any reason for backchannel URLs to be requested multiple
>> >> times,
>> >> so in addition to a request or response using strongly random nonces in
>> >> the backchannel URLs, the backchannel URLs should be very short-lived,
>> >> probably each side "SHOULD" allow a URL to be requested only once, and
>> >> throw a 403/404 for subsequent requests.
>> >>
>> >> Is there any draft of AX using backchannel URLs?
>> >>
>> >> -Peter
>> >
>> >
>> > _______________________________________________
>> > specs mailing list
>> > [email protected]
>> > http://lists.openid.net/mailman/listinfo/openid-specs
>> >
>> >
>>
>>
>>
>> --
>> --Breno
>>
>> +1 (650) 214-1007 desk
>> +1 (408) 212-0135 (Grand Central)
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>> PST (GMT-8) / PDT(GMT-7)
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>
>
>
> --
> Chris Messina
> Open Web Advocate
>
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>
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