CAP is an open standard XML-based format designed for exchanging emergency alert and public warning messages between alerting systems. CAP provides a flexible framework for the dissemination of alerts, allowing recipients to process and display the information in a variety of ways. Here are the general guidelines for implementing CAP alerts:
CAP messages must be formatted using XML (eXtensible Markup Language).
CAP alert message consists of multiple sections, including the alert header, info block, event block, parameter block, and resource block.
Each CAP alert should include a unique identifier. This identifier helps in tracking and referencing the alert message.
CAP alerts should clearly indicate the source of the alert, typically through the "sender" element. The sender information can include the name of the organization or agency responsible for issuing the alert.
The event Information contains details about the event being alerted. It includes elements such as event type, event code, event description, and event severity. This section provides essential information about the nature and potential impact of the event.
CAP alerts can be targeted to specific geographic areas. It can specify areas using various methods, such as specifying coordinates, defining polygons, or referencing predefined geographic areas.
CAP alerts include information about the timing of the event and the validity of the alert. This includes elements such as the expected onset and expiration times of the event, as well as the effective and expiry times of the alert itself.
CAP alerts may also include instructions to guide recipients on appropriate actions to take in response to the event. The instructions can provide details on evacuation routes, shelter locations, contact information, or any other relevant guidance
CAP allows us to include alert messages in multiple languages. This enables recipients to receive alerts in their preferred language if supported by the alerting system.
When implementing CAP, it is important to ensure accessibility for individuals with disabilities. This may involve providing alternative formats or compatible assistive technologies for receiving and displaying CAP alerts.
CAP alerts are typically disseminated through various communication channels, including emergency alert systems, websites, mobile applications, and social media platforms. Implementing CAP requires integration with these systems to ensure the timely and accurate delivery of alerts.