http://hl7.org/fhir/StructureDefinition/observation-precondition|5.2.0
Other preceding or concurrent observations that must be known to understand the context and significance of the observation. For example, an fiO2 measure taken alongside of a SpO2 measurement. See the FHIR specification [Observation notes](http://hl7.org/fhir/observation.html#notes) section for additional guidance.
| url | version | package |
|---|---|---|
| http://hl7.org/fhir/StructureDefinition/observation-precondition | 5.2.0 | hl7.fhir.uv.extensions@5.2.0 |
| http://hl7.org/fhir/StructureDefinition/observation-precondition | 4.0.1 | hl7.fhir.r4.core@4.0.1 |
| http://hl7.org/fhir/StructureDefinition/observation-precondition | 5.2.0 | hl7.fhir.uv.extensions.r4@5.2.0 |
| http://hl7.org/fhir/StructureDefinition/observation-precondition | 4.0.1 | hl7.fhir.r4.examples@4.0.1 |