Standards
Time
All OGIS timestamps use RFC 3339 UTC with millisecond precision where available.
| Field | Role |
|---|---|
observed_at |
Required. Clinical time the glucose value represents |
source_recorded_at |
When the source system recorded the reading, if different |
received_at |
When the consumer or bus received the event |
provenance.ingested_at |
When OGT ingested and mapped the raw event |
HealthKit mapping: startDate → observed_at. Future timestamps
must not be used for observed_at.