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Overview of Common Policies and Practices for CAP Alerts

The presentation by Eliot Christian at CAP Training Day discussed CAP Alert Hubs, individual CAP alerts, CAP Alert Feeds, and the need for common policies and practices in presenting alerts. It highlighted the role of CAP Alert Hubs in aggregating and republishing alerts, the structure of CAP alerts, and the importance of standard policies for alerting systems. Various organizations are involved in refining these practices to enhance the efficiency of emergency messaging systems.

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Overview of Common Policies and Practices for CAP Alerts

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  1. Common Policies and Practices Presented 10 October 2023 at the CAP Training Day in Geneva, Switzerland Speaker: Eliot Christian CEO, Alert-Hub.Org CIC Eliot.J.Christian@alert-hub.org

  2. Major Topics  Background  CAP Alerts  CAP Alert Feeds  Other Dissemination Notes Common Policies and Practices 2

  3. What are CAP Alert Hubs?  A CAP Alert Hub aggregates published CAP alerts  Each CAP Alert Hub republishes CAP alerts to its own audience  CAP Alert Hubs provide only a copy of the alert; they do not have the role of an alerting authority  CAP Alert Hubs are alert publishers, rather than alert originators or alert editors Common Policies and Practices 3

  4. An Individual CAP Alert A CAP alert is an XML document compliant with the schema defined in ITU X.1303 A CAP alert is attributable to a particular alerting authority at the particular time it was issued A CAP alert is a public, legal document: individual alert “A public document is one that is or should legally be readily available for inspection by the public, as a document issued by [...] a governmental department.“ Common Policies and Practices 4

  5. A CAP Alert Feed A CAP Alert Feed provides time- ordered links to CAP alerts as a publish/subscribe service compliant with either the RSS or ATOM Internet standards series of alerts individual alert Common Policies and Practices 5

  6. A CAP Alert Hub A CAP Alert Hub provides aggregated alerts as publish/subscribe services Supports “shared situational awareness” at any scale: city, nation, region, global May focus on a particular theme, type of hazard, highest impact, etc. collection of alerts series of alerts individual alert Common Policies and Practices 6

  7. Example: Filtered Alert Hub  Filtered Alert Hub re-publishes 227 CAP Alert feeds so far  Each CAP Alert source is described in this JSON file https://alert-hub.s3.amazonaws.com/cap-sources.html  The aggregation status of each source is reported at https://www.alert-hub.org/feedFacade/  Many subscription feeds for current CAP alerts are available, see https://alert-hub.s3.amazonaws.com/cap-feeds.html  feedMap shows current alerts from any subscription feed, e.g., https://cap.alert-hub.org/feedMap.html? rssUrl=https://cap-alerts.s3.amazonaws.com/unfiltered/rss.xml Common Policies and Practices 7

  8. The Need for Common Policies and Practices  The CAP standard does not address any matters of policy, nor practices such as how to present alerts  Policies can be important for users, especially re-publishers  Knowing how alerts are treated by CAP Alert Hubs can inform design choices in alerting systems that emit to, ingest from, or serve as, a CAP Alert Hub Common Policies and Practices 8

  9. Published Document (version 0.2) Common Policies and Practices https://docs.google.com/document/d/1h_6mtP8WM nyxKyzN_YTI4N2XR9QuTWs3/ Common Policies and Practices 9

  10. Organizations Involved  Comments have been incorporated from seven organizations: Alert-Hub.Org CIC, European Meteorological Network of National Meteorological Services, Google Crisis Response team, Hong Kong Observatory (HKO), International Federation of Red Cross and Red Crescent Societies (IFRC), meteoblue.com, and Traveller Information Services Association (TISA).  Notations show wherever one or more of these organizations does not use the particular policy or practice, or uses a variation of it  We hope this document will also enhance harmonization among CAP-enabled emergency messaging systems and their various tools for creating, publishing, or using CAP alerts 10

  11. Major Topics  Background  CAP Alerts  CAP Alert Feeds  Other Dissemination Notes Common Policies and Practices 11

  12. CAP Alerts, General 1.1.1 Each CAP Alert is a Separate File 1.1.2 Each CAP Alert should reference an XML Stylesheet 1.1.3 CAP Profiles and Guidelines 1.1.4 Republishing an Exact Copy 1.1.5 No Access Constraints or Use Constraints Common Policies and Practices 12

  13. CAP Alerts, General 1.1.6 Identifying the Type of Event 1.1.7 Geo-targeting of Alerts 1.1.8 Duration 1.1.9 Updates Common Policies and Practices 13

  14. CAP Alerts, General 1.1.6 Identifying the Type of Event 1.1.7 Geo-targeting of Alerts 1.1.8 Duration 1.1.9 Updates Common Policies and Practices 14

  15. CAP Alerts, General (continued) 1.1.10 Distinguishing "High Priority" Alerts 1.1.11 Alerts with Multiple "info" Elements 1.1.12 Digital Signing of CAP Alerts Common Policies and Practices 15

  16. CAP Alerts, Specific Elements 1.2.1 Description 1.2.2 Instruction 1.2.3 Web 1.2.4 Urgency, Severity, Certainty Common Policies and Practices 16

  17. CAP Alerts, Specific Elements (continued) 1.2.5 Resource 1.2.6 Restriction and Addresses 1.2.7 All Clear Common Policies and Practices 17

  18. CAP Alerts, Specific Elements (continued) 1.2.8 Cancel 1.2.9 Test and Exercise 1.2.10 “Ack” and “Error” msgType values Common Policies and Practices 18

  19. CAP Alerts, Design Principles 1.3.1 Understandability and Constancy 1.3.2 Localization 1.3.3 Graphics Design and Coloring 1.3.4 Text Design 1.3.5 Interaction Design Common Policies and Practices 19

  20. CAP Alerts, Design Principles (continued) 1.3.6 Official Emergency Tone 1.3.7 Persons with Disabilities 1.3.8 Telecommunications Efficiency 1.3.9 Alerting Messages Evolve Common Policies and Practices 20

  21. Major Topics  Background  CAP Alerts  CAP Alert Feeds  Other Dissemination Notes Common Policies and Practices 21

  22. CAP Alert Feeds 2.1 Feeds Link to CAP Alerts 2.2 Selection of alert sources 2.3 Republishing Period 2.4 Sources Accessed through an Aggregator 2.5 Designation of "Official" Sources Common Policies and Practices 22

  23. CAP Alert Feeds (continued) 2.6 CAP Feed URL 2.7 Attribution and Logo 2.8 Encryption of CAP Feeds Common Policies and Practices 23

  24. Major Topics  Background  CAP Alerts  CAP Alert Feeds  Other Dissemination Notes Common Policies and Practices 24

  25. Other Dissemination Notes 3.1 CAP alerts via internet news feeds 3.2 Media not based on Internet 3.3 Broadcast Radio and Television 3.4 CAP Alerts to Travellers on the move 3.5 CAP Alert Hubs Common Policies and Practices 25

  26. Other Dissemination Notes (continued) 3.1 CAP alerts via internet news feeds 3.2 Media not based on Internet 3.3 Broadcast Radio and Television 3.4 CAP Alerts to Travellers on the move 3.5 CAP Alert Hubs Common Policies and Practices 26

  27. Other Dissemination Notes (continued) 3.6 Security, Reliability, and Speed 3.7 No Personally Identifiable Information 3.8 Geo-location Privacy Common Policies and Practices 27

  28. Other Dissemination Notes (continued) 3.9 Non-proprietary Works 3.10 All Valid CAP Alerts are Republished 3.11 CAP Alerts for Missing Persons Common Policies and Practices 28

  29. Other Dissemination Notes (continued) 3.12 Unintentional Blocking of Access 3.13 Prompt Updating and Resolution of Errors 3.14 Prompt Updating of Alerting Authority Information 3.15 Access to the Alert Hub Archive 3.16 Sharing Analytic Data on alerts Common Policies and Practices 29

  30. End Common Policies and Practices https://docs.google.com/document/d/1h_6mtP8WM nyxKyzN_YTI4N2XR9QuTWs3/ Common Policies and Practices 30

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