http://hl7.org/fhir/StructureDefinition/openEHR-exposureDescription|5.2.0

Text description about exposure to the Substance.
NameFlagsCardTypeDescription & Constraints
Extension
0..1Text description about exposure to the Substance
 
extension
?..0
 
url
?..?
 
value[x] *
1..?
 
 
valueString *
1..?string