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    CAP resources logo This collection of resources provides IT and communications staff guidance on setting up the software used for issuing CAP alerts and assuring that alerts meet CAP standards. As a collection of resources, this is a not a course, no badges or certificates of completion are issued.

    • From an IT perspective, implementing the CAP standard is fairly straightforward. The key is knowing how the CAP standards dictate the format and dissemination of alerts. As an XML-based protocol, the basic principles are simple: create your alerts in properly formatted XML files and make those files easily accessible to your clients. Beyond the basics, things of course become a bit more involved. If you already have a tool for creating alerts, you'll need to evaluate how to best convert those alerts to the CAP standards for format and content. You'll also need to host an alert news feed following the proper syndication standards. Other factors to consider include validation, security, and, depending on the target audience, the types of media appropriate for inclusion in an alert. Every organization will have unique needs. 

      The CAP Basics course provides an introduction to CAP alerting. Guidelines for Implementing CAP Alerts provides a framework for developing an implementation plan. Here, you'll hopefully find the resources you'll need to put that plan in place. Since this is not a course, there is no particular order in which you need to review these resources nor will all resources be necessarily helpful to you.

      For a brief and generic guideline for implementing CAP alerting tools, you may want to refer to the WMO No. 1109 Guidelines for Implementation of Common Alerting Protocol (CAP)-Enabled Emergency Alerting. While it doesn't go into details, it does provide an overview of the various technologies and tools a CAP alert system may contain. 

    • WMO-No. 1109 Guidelines for Implementation of Common Alerting Protocol (CAP)-Enabled Emergency Alerting Archivo PDF

      Guidelines for implementing the technical components of the CAP standard. Also available in other languages here. 

      3.6 MB
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    Defining CAP XML Standards

    These resources provide details on the XML structure of CAP messages. This information is critical for organizations developing or updating their own CAP alert authoring tools. 

    • CAP-103 XML for CAP Implementors (PowerPoint) Archivo PPT

      Eliot Christian's presentation on the XML structure of CAP messages.

      3.8 MB
    • Common Alerting Protocol Version 1.2: OASIS Standard - PDF Archivo PDF

      This is the OASIS (Organization for the Advancement of Structured Information Standards) document defining CAP version 1.2. It details the XML structure and elements used for CAP alerts. Also available as HTML on the OASIS website.

      567.3 KB
    • CAP Validator URL

      A free service that checks the syntax of CAP XML messages and Atom, RSS and EDXL-DE feeds of CAP messages. It supports CAP v1.0, v1.1 and v1.2.

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    Creating a Source of CAP Alerts

    These resources pertain to creating a source of CAP alerts. Options here include writing alerts using a text authoring tool, modifying an existing alerting tool, hosting open source tools, or using an alert hosting service. Your situation and needs will dictate which resources to use.

    • Implementing a Source of CAP Alerts Video Presentation Página

      This 36 minute presentation walks through the details of creating a CAP alert: authoring an alert file; hosting alert files; validation; security and authentication considerations; content considerations based on target media.

    • Implementing a Source of CAP Alerts PowerPoint Archivo PPT

      PowerPoint presentation used in Eliot's Christian's video presentation on implementing a source of CAP alerts.

      1.5 MB
    • Task Analysis for Composing an Alert Message Archivo PDF

      This Task Analysis focuses on the tasks involved when an authorized person composes an alert message, tasks situated between the decision to alert and the dissemination of that alert. It addresses only alert composition tasks supported by online tools and only for the issuing of alerts online in the Common Alerting Protocol (CAP) format. The analysis is intended to inform development of well-designed tools for alert composition and so to help alert composers apply their expertise efficiently and effectively.


      186.8 KB

    • Software and Hosting Services

    • CAP AlertEditor Página

      Eliot Christian's alert editing software. This is a Java-based tool for authoring and publishing CAP alerts to a CAP alert news feed. 

    • CAP AlertEditor Operations Guide Archivo PDF
      137.4 KB
    • CAP AlertEditor Software Archivo ZIP
      5.8 MB
    • Tomcat Server Software Archivo ZIP
      9.7 MB
    • Java JDK Download Site URL
    • CAPTools Open Source Initiative URL

      Github repository for CAPCreator, CAPCollector, CAPConsumer. This collection of tools is made available through an effort at Carnegie Mellon University.

    • Filtered Alert Hub Open Source Initiative URL

      Github repository for Filtered Alert Hub software.

    • CAP Alert Editor: Hosted CAP Alerting URL

      This site provides a cloud-based platform for publishing CAP alerts. It is available to any country in need of a platform for publishing CAP alerts. As of March 2019, it is maintained by Eliot Christian through NOAA's Big Data Project.

    • Apps and Misc Software Resources

    • IFRC Universal App Program URL

      The International Federation of Red Cross and Red Crescent Societies (IFRC) offers a suite of tools and templates for developing locally relevant alert apps.

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    Publishing Alert News Feeds

    Through the use of RSS or Atom syndication standards, CAP alerts are published and made available to their target audience. The following resources provide insight on using and creating CAP alert news feeds.

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    Sample CAP-enabled Aggregators and Hubs

    The following is a very small sampling of CAP alert technology leveraged for situational awareness. It is informative to explore these and other alerting tools to gather ideas for your own organizational needs.

    • WMO Severe Weather Information Centre URL

      A CAP alert aggregator of official warning and information issued by National Meteorological and Hydrological Services (NMHSs). 

    • Filtered Alert Hub Prototypes URL

      Examples Filtered Alert Hubs using the open source tools available through NOAA's Big Data Project.

    • Google Public Alerts URL

      Google aggregates CAP alerts from many international partners. Extensive information and guidance on participating is available here. 

    • Windy.com URL

      A comprehensive display of weather and CAP alerts. Developed by a passionate pilot for free reuse.

    • MeteoAlarm URL

      A CAP weather alert aggregator with feeds from many European Union meteorological services. 

    • Meteoalert URL

      An CAP weather alert aggregator for Russia.

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    Register of Alerting Authorities

    • WMO/TD No. 1556: Administrative Procedure for Registering WMO Alerting Identifiers Archivo PDF

      This document enables the registration of Object IDentifiers (OIDs) for alerting information, i.e., content included in alert messages or otherwise associated with the activity of alerting. The Registration Authority, World Meteorological Organization (WMO), maintains these OIDs and accepts requests through WMO Members for the assignment of additional OIDs for information objects relevant to alerting. This document specifies rules for the registration of all such OIDs subordinate to the alerting OID arc administered by WMO. Also available in other languages here. 

      220.6 KB
    • WMO Register of Alerting Authorities URL

      The international Register of Alerting Authorities was set up by the World Meteorological Organization (WMO) and the International Telecommunication Union (ITU). Each WMO Permanent Representative (PR) maintains entries for their nation. The PR represents the entire nation and should register all nationally recognized alerting authorities. The Register is maintained by the WMO Public Weather Services Delivery (PWSD) programme.