Extension 
extension 
url Documentation for this formatThis is the set of resources that conform to either of the profiles Specimens requested by a laboratory service (http://hl7.org/fhir/uv/order-catalog/StructureDefinition/SpecimenRequested) and Specimens requested by a laboratory service (http://hl7.org/fhir/uv/order-catalog/StructureDefinition/SpecimenRequested). E.g. what you have to deal with if you get resources conforming to one of them
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension | 0..* | Extension | ||
| extension | 0..* | Extension | Extension | |
| url | 1..1 | uri | identifies the meaning of the extension | |
| Documentation for this format | ||||