The document discusses the Common Alerting Protocol (CAP), which is a standard format for communicating hazard warnings across all media types. It was adopted by the World Meteorological Organization (WMO) for early warning systems. CAP allows communication of any hazard type to the public or designated groups. The document outlines CAP implementation in various countries and organizations, including the Philippines where CAP will be used to disseminate early warnings over the internet, smartphones, radio, and TV.