Enforce correct CAP identifier OID format (WMO / ITU specification) #142
Description
Summary
Ensure all CAP alert identifier values conform to the ITU OID specification and the WMO guidelines for CAP identifiers. Currently, some alerts incorrectly start with urn:oid:2.49.0.0… instead of urn:oid:2.49.0.1….
Background / Problem
The CAP identifier element must be globally unique, persistent, and standards-compliant. When based on an ITU OID, the format must adhere to both ITU and WMO specifications.
- Observed issue: Some alerts are being published with identifiers beginning with 2.49.0.0 (incorrect).
- Correct format: Identifiers must begin with 2.49.0.1 for published alerts.
Reference (WMO guideline):
First value 2 → OID namespace registered by ISO/ITU.
Second value 49 → Emergency alert system.
Third value 0 → Alert publisher registered in the WMO International Register of Alerting Authorities.
Fourth value 1 → Published alert (instead of 0, which would denote information about the publisher).
Example of valid identifier (Ethiopia):
urn:oid:2.49.0.1.231.0.2024.9.1.10.0.0
Acceptance Criteria
- Publish blocked if identifier starts with 2.49.0.0.
- Publish allowed only if identifier starts with 2.49.0.1.
- Error clearly explains the required format.
- Draft save allowed with warning.
- Auto-generation of valid identifiers available in UI.
- Unit tests for valid vs invalid identifiers.