There is a growing call for the use of open source content standards for all-hazards, all-media alert and notification systems. Content standards such as Common Alerting Protocol (CAP), Emergency Data Exchange Language (EDXL) and others promise to improve the interoperatiblity of hazard information systems at both the internetworking and last-mile stages of distribution. Despite the promise that these standards hold for improved disaster management, there is limited understanding of specific implementation issues and challenges associated with the use of content standards for last-mile alert and notification system. This is especially the case in developing countries, such as Sri Lanka, where community-based hazard information systems are being introduced to complement and extend the functionality of national and regional systems. The Discoveries and Breakthroughs in Science report on “New Disaster Warning Standards” provide the true features of CAP.