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Subject: Re: [emergency] Response from David Ellis - Video in <derefUri>

Is the need here to send the video data inside the derefUri (as frames,
or a file, or whatever), or externally as a stream? 

If anything, the video should be sent separately with the derefUri
pointing to the video 'location' via metadata file(s). That way you do
not lose two birds with one stone when your CAP file is not received --
and your ops software can automatically verify if the either the sensor
or cctv feed is down, or both. Bundling costs you your redundancy in
differentiated transports.

Poor Elysa, having to route messages back and forth ;-).


On Thu, 2005-01-13 at 13:05 -0600, Elysa Jones wrote:
> Please forward to the mailing list.  The alerting framework already can
> handle video without operational impact.  The "publish and subscribe"
> nature of the framework minimizes the delivery of unwanted messages.
> Also, the normal XML messages from sensor systems is usually extremely
> short do the limited processing capability and power budget of the
> devices.
> This being said, the use of the <derefUri> for sending detection data
> from special purpose nodes (e.g. sensors or sensor concentrators) and/or
> private networks which are unreachable from the "Internet" is the best
> way to get this data to a general purpose computer.  This is only way to
> publish the detected data.  This detection data is usually stored in a
> local tactical data base for not only emergency use but to be retrieve
> periodically to develop base line data and State of Health of the large
> network.
> The video issue is very real.  We continuously struggle with the Concept
> of Operation issue (CONOPS.)  The use of video to assess whether CBRN
> sensor detections are real versus a false alarm and to assist in first
> and emergency responders command and control is critical.  Cameras do
> not die but people do when exposed to CBRN events.  The problem is who
> really need to see the video data.  When the Four star general and/or
> the civilian equivalent wants to monitor the response in real time it is
> hard to tell them no.  This may be something which will be solved by the
> EDXL standards work.
> I would be very interested to talk with committee members who have
> experience with this type of CONOPS problem.

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