Table
| Extension | 0..* | |
| Extension.id | string | 0..1 |
| Extension.extension | Extension | 0..* |
| Extension.url | uri | 1..1 |
| Extension.value[x]:valueReference | Reference(medicationrequest) | 0..1 |
| Extension.value[x]:valueReference.id | string | 0..1 |
| Extension.value[x]:valueReference.extension | Extension | 0..* |
| Extension.value[x]:valueReference.reference | string | 0..1 |
| Extension.value[x]:valueReference.identifier | Identifier | 0..1 |
| Extension.value[x]:valueReference.display | string | 0..1 |