http://hl7.org/fhir/StructureDefinition/maxDecimalPlaces|4.0.1

Identifies the maximum number of decimal places that may be specified for the data element.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/integer