I am not trying to open again the discussion on HTTP-based discovery we had 
some time ago, but it looks to me that situations like the one described by 
Wendy could imply that we'd need some mechanism for optionally providing 
metadata as a result of the initial discovery process. Unless I am missing 
something, this would be a case for an extended HTTP-based discovery.

I think we could discuss on this during the extended evening session that 
Enrico announced for Wednesday.

Be goode,

On 24 Jul 2013, at 09:48 , Sebastian Kiesel wrote:

> On Tue, Jul 23, 2013 at 04:52:35PM -0400, Wendy Roome wrote:
>> Here's why an IRD returned by ALTO discovery must must have a default
>> network map. Consider an ALTO client that gets the server URI via discovery.
>> By definition, a discovery client must be provider-independent. Because
>> resource ID names are provider-specific, a discovery client cannot be
>> pre-configured with a map ID. Hence any IRD returned by discovery MUST mark
>> one of its maps as the default. If not, a discovery client can't decide
>> which network map to use.
>>
>> Of course, there'd be no problem if ALTO discovery could return a map ID as
>> well as a URI. But I gather that's not possible.
>
> The current discovery procedures do not support that, and it seems to me
> that this would only move the problem to another subsystem instead of
> solving it - if you cannot decide which map to mark as default in the
> IRD, how could you decide which map name to indicate as default using a
> to-be-defined extension of the discovery mechanism?
>
> Thanks
> Sebastian
>
> _______________________________________________
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> [email protected]
> https://www.ietf.org/mailman/listinfo/alto


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"Esta vez no fallaremos, Doctor Infierno"

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Telefonica I+D
http://people.tid.es/diego.lopez/

e-mail: [email protected]
Tel:    +34 913 129 041
Mobile: +34 682 051 091
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