FYI: OGC approves Sensor Alert System Interoperability Experiment

The OGC has just approved a new Interoperability Experiment for Sensor 
Alerts. A description is provided for your information. Also, FYI, does include 
CAP. Any questions, please let me know. Also, please, your comments and input 
would be very much appreciated!

 

Regards

 

Carl

Description: 

This proposed 
Interoperability Experiment (IE) is intended to create a prototype specification 
of a Sensor Alert Service (SAS) as a part of the OGC Sensor Web Enablement (SWE) 
effort.

 

Technical Approach: 

The SWE Working 
Group has recognized that a missing piece of the SWE suite of standards and 
proposed standards is an alert and notification mechanism that specifies how 
alert or “alarm” conditions are defined, detected, and made available to 
interested users. This IE will create a draft alert standard known as the Sensor 
Alert Service (SAS). Since this standard will be focused on alerts from sensors 
and sensor webs, it will be narrower in scope than a complete Web-wide alerting 
service. Therefore it is named Sensor Alert Service rather than Web Alert 
Service (WAS).

 

There is an 
existing OGC discussion paper (OGC 03-100) on a proposed WAS that is broader in 
scope than the SAS. The SAS is expected to be a small and focused service for 
the purpose of handling alert conditions in a sensor web.

 

After 
requirements are defined, the first efforts to define the SAS will include a 
survey of existing standards to see if any meet the focused needs of the SAS 
requirements. Standards to be considered include, but are not limited to, the 
OASIS Web Services-Notification suite (WS-N) and the OASIS Asynchronous Service 
Access Protocol (ASAP). It is our intent to embrace existing standards where 
appropriate and extend them if necessary, including reporting back to the 
respective standards bodies the changes needed to meet our needs and work to get 
those changes incorporated into the existing standards.  Only if no existing standard meets the 
needs of SWE alert handling will a new standard service be defined.

 

Note that SWE 
already includes a discussion paper (OGC-03-008r2) describing the Web 
Notification Service (WNS). WNS was designed to permit a client to engage in 
asynchronous message interchanges with one or more other services. As such, WNS 
does not meet the needs of an alert notification system. SAS does not compete 
with WNS. In fact, SAS may, but is not required to, utilize WNS for 
notifications.

 

Carl Reed, PhD
CTO and Executive Director Specification 
Program
OGC

The OGC: Helping the World to Communicate Geographically

 

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