Standards

Versioning

Version identity is carried by event_type + event_version (e.g. glucose.reading / 0.1).

Change policy

Additive changes within a minor schema revision may add optional fields with RFC notice
Breaking changes require a new event_version or new event_type and migration guidance
Deprecation windows should be documented before removing fields or enums

Record the Git tag or SHA when vendoring schemas in OGT or applications. See Downloads and governance Versioning Policy.