> -----Original Message-----
> From: Scott Lawrence [mailto:[email protected]]
> Sent: Monday, April 05, 2010 2:30 PM
> To: Hadriel Kaplan
> 
> The spec says in section 2.6
> (Validity of Stored Configuration Data):
> 
>         The UA MAY use configuration data that is of unknown validity,
>         or configuration data that is known to be no longer valid, while
>         attempting to revalidate that data or obtain new data.
> 
> So the UA may use the configuration data before any subscription is
> established - the subscription does not block anything (except getting
> change notices).

Heh... weren't you just arguing about how optional requirements in IETF docs 
are bad?  ;)

This form of optional is right up that alley.  For example, if I am a service 
provider who wants to not have Subscription mode, and the only way to do it is 
through UA config framework itself by setting a config field for 
"Subscribe-UA-Config="false" or whatever, then clearly the UA's MUST use the 
config.  A MAY statement does nothing.

If it's not clear and exact as to what config data a UA is supposed to use, and 
when, then you really do get "flaky service behavior" as you were worried about 
in a previous email.

-hadriel
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