Re: [earlywarning] [CAP] Definition of Warning Categories

I'm also not convinced that categories are all that useful, at least  
among different kinds emergencies. It seems a bit far-fetched to say  
"I want to know if there's a tsunami, but not a tornado or chemical  
leak, affecting my area". There are likely to be non-emergency  
categories, such as school closings or traffic alerts, that may have  
more limited appeal, but may use the same basic infrastructure.

Henning

On Jul 12, 2009, at 3:23 PM, Art Botterell wrote:

> I'm wondering whether it might be simpler, at least in the near  
> term, to let consumers subscribe to selected sources rather than to  
> topical categories.  That pushes the question of message  
> authoritativeness / jurisdiction  /credibility out of the CAP  
> infrastructure and into the larger field of inter-agency and inter- 
> jurisidictional coordination, where it more properly belongs.
>
> Taxonomies tend to be culturally loaded and can never be guaranteed  
> to be complete.  Thus there's a real risk of "categorical  
> disconnects" leading to missed alerts either because of differing  
> interpretations of categories or of unforeseen events that don't fit  
> our preconceived categories.  Maybe someday we'll have a reliable  
> taxonomy of the unexpected, but right now a degree of deliberate  
> imprecision seems to be the best we can do... and I sometimes wonder  
> whether even that is more helpful than it is risky.
>
> - Art
>
>
> On Jul 12, 2009, at 7/12/09 11:58 AM, Hannes Tschofenig wrote:
>
>> I should provide a bit more feedback about the background to my  
>> question.
>>
>> If you only set the value in the category field for the purpose of  
>> human
>> consumption then there is not really an interoperability issue.
>>
>> Now, with the work on http://tools.ietf.org/html/draft-rosen-sipping-cap-03
>> we wanted to define an event package for SIP that allows you to  
>> "subscribe"
>> to certain type of events: you might indicate something like  
>> location and
>> the type of events you are interested in.
>>
>> Now, the semantic of the category field suddently matters. With the
>> individuals-to-citizen emergency services we tried to come up with a
>> description of the emergency services categories, see RFC 5031.
>>
>> Ciao
>> Hannes
>
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