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

["David Aylward \(Comcare\)" <daylward at comcare.org>]

Hannes:

That is exactly what I was talking about, but CAP was not designed for that.
It is a 
"broadcast to the world" standard.  It is excellent for that purpose, but
not for the more refined purpose you are pursuing.

The OASIS EDXL Distribution Element was designed for exactly that purpose:
machine to machine routing based on incident type, role and similar factors,
and primarily as Art suggests in the "wholesale", inter-organization world.


Organizations (and individuals connected to them) subscribe to "hear" about
incident types within certain geographies.  

We have talked in the past, Hannes, about "core services", the purpose of
them is to provision queries such as you suggest, and govern rights to send
and receive such messages.  

Lots of work has been done on these ideas outside of the message-specific
standards that they would enable.

 
David K. Aylward, President
COMCARE Emergency Response Technology Group
1351 Independence Court, SE
Washington, DC 20003
202.255.3215 (mobile)
202.295.0136 (office)
202.521.4047 (fax)
daylward at comcare.org
 
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-----Original Message-----
From: cap-list-bounces at lists.incident.com
[mailto:cap-list-bounces at lists.incident.com] On Behalf Of Art Botterell
Sent: Sunday, July 12, 2009 3:23 PM
To: earlywarning at ietf.org; cap-list at incident.com
Subject: Re: [CAP] Definition of Warning Categories

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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