FHIR Period Data Type (R4)
Period is a time range with an optional start and end. Element table, example JSON and FHIRPath for FHIR R4.
- FHIR Period Data Type (R4) — part of the free FHIR Toolbox library.
- Runs entirely in your browser: your FHIR data is never uploaded to a server.
Overview
Period is a time range with an optional start and end. A missing end means the period is ongoing; a missing start means the start is unknown.
Elements
| Element | Type | Cardinality | Description |
|---|---|---|---|
| Period.start | dateTime | 0..1 | Starting time with inclusive boundary |
| Period.end | dateTime | 0..1 | End time with inclusive boundary, if not ongoing |
Example JSON (R4)
{
"start": "2024-05-01T09:00:00Z",
"end": "2024-05-01T09:45:00Z"
}
FHIRPath
Encounter.period.start— Start of an R4 Encounter
FHIR Toolbox is a free, privacy-first collection of HL7 FHIR utilities by Omindra Labs. Every tool performs zero-server processing — your health data never leaves your device.