Union of http://hl7.org/fhir/tools/StructureDefinition/searchparameter-base-type and http://hl7.org/fhir/tools/StructureDefinition/searchparameter-base-type

This is the set of resources that conform to either of the profiles Search Parameter Base Type (http://hl7.org/fhir/tools/StructureDefinition/searchparameter-base-type) and Search Parameter Base Type (http://hl7.org/fhir/tools/StructureDefinition/searchparameter-base-type). 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..*Base for search parameter when not a resource
... url 1..1uriidentifies the meaning of the extension
... value[x] 1..1codeValue of extension

doco Documentation for this format