http://hl7.org/fhir/StructureDefinition/organizationaffiliation-primaryInd|4.0.1

Flag indicating if the specialty is the primary specialty of the provider. Normally, a practitioner will have one primary specialty, but in some cases more than one can be primary.
NameFlagsCardTypeDescription & Constraints
Extension
0..1Indicator of primary specialty
 
extension
?..0
 
url
?..?
 
value[x] *
1..?
 
 
valueBoolean *
1..?boolean