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The '''Common Alerting Protocol''' ('''CAP''') is an [[XML]]-based data format for exchanging [[Emergency population warning|public warnings]] and emergencies between [[alerting technologies]]. CAP allows a warning message to be consistently disseminated simultaneously over many warning systems to many applications. CAP increases warning effectiveness and simplifies the task of activating a warning for responsible officials.
By normalizing alert data across threats, jurisdictions, and warning systems, CAP also can be used to detect trends and patterns in warning activity, such as trends that might indicate an undetected hazard or hostile act. From a procedural perspective, CAP reinforces a research-based template for effective warning message content and structure.
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==Background==
The U.S. [[National Science and Technology Council]] (NSTC) November 2000 report on “Effective Disaster Warnings” recommended that “a standard method should be developed to collect and relay instantaneously and automatically all types of hazard warnings and reports locally, regionally and nationally for input into a wide variety of dissemination systems”.<ref>http://www.sdr.gov/NDIS_rev_Oct27.pdf</ref>
In 2001 an international, independent group of over 120 emergency managers convened online by California emergency telecommunications expert Art Botterell began specifying and prototyping the Common Alerting Protocol data structure based on the recommendations of the NSTC report. The project was embraced by the non-profit Partnership for Public Warning and a number of international warning system vendors.<ref>http://www.ppw.us</ref> A series of field trials and long-term demonstration projects during 2002-03 led to the submission of a draft CAP specification to the OASIS standards process for formalization.
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It is also mentioned by the [[Internet Society]] in its 2005 "Public Warning Network Challenge".<ref>{{cite web|url=http://www.isoc.org/challenge/|title=The Internet Rises to the Challenge of Public Warning|work=isoc.org}}</ref>
In early 2005, the U.S. Department of Homeland Security (DHS), in partnership with the Association of Public Television Stations,<ref>{{cite web|url=http://www.apts.org|title=Association of Public Television Stations|work=apts.org}}</ref> demonstrated CAP-based "digital EAS" broadcasts over public television digital TV transmitters and satellite links in the [[Washington, D.C.]] area and nationwide.
CAP is the foundation technology for the planned "Integrated Public Alert and Warning System", an all-hazard, all-media national warning architecture being developed by DHS, the [[National Weather Service]] within NOAA, and the [[Federal Communications Commission]].<ref>http://www.fema.gov/emergency/ipaws/</ref>
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CAP has been implemented for a small-scale, grassroots hazard information system in [[Sri Lanka]] following the [[2004 Indian Ocean Tsunami]]. This implementation was part of the "HazInfo Project", funded by Canada's International Development Research Centre.<ref>{{cite web|url=http://www.lirneasia.net/projects/current-projects/evaluating-last-mile-hazard-information-dissemination-hazinfo/|title=Evaluating Last-Mile Hazard Information Dissemination (HazInfo)|work=lirneasia.net}}</ref>
The province of [[Alberta]] adopted CAP as part of its [[Alberta Emergency Alert]] system. In March 2015, [[Alert Ready]], a national public warning system based upon CAP-CP, was officially launched. Participation in the system by broadcasters is mandated by the [[
===Australia===
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