Union of http://hl7.org/fhir/StructureDefinition/openEHR-exposureDescription and http://hl7.org/fhir/StructureDefinition/openEHR-exposureDescription

This is the set of resources that conform to either of the profiles AllergyIntolerance ExposureDescription (http://hl7.org/fhir/StructureDefinition/openEHR-exposureDescription) and AllergyIntolerance ExposureDescription (http://hl7.org/fhir/StructureDefinition/openEHR-exposureDescription). E.g. what you have to deal with if you get resources conforming to one of them

Structure

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..1Text description about exposure to the Substance
... url 1..1uriidentifies the meaning of the extension
... value[x] 1..1stringValue of extension

doco Documentation for this format