Common Alerting Protocol Version 1.2: OASIS Standard - 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 PDF document
Click CAP-v1.2-OASIS.pdf link to view the file.