Table
| Extension | 0..* | |
| Extension.id | string | 0..1 |
| Extension.extension | Extension | 0..* |
| Extension.extension:metric-type | Extension | 0..* |
| Extension.extension:metric-type.id | string | 0..1 |
| Extension.extension:metric-type.extension | Extension | 0..* |
| Extension.extension:metric-type.url | uri | 1..1 |
| Extension.extension:metric-type.value[x]:valueCodeableConcept | CodeableConcept | 0..1 |
| Extension.extension:metric-unit | Extension | 0..* |
| Extension.extension:metric-unit.id | string | 0..1 |
| Extension.extension:metric-unit.extension | Extension | 0..* |
| Extension.extension:metric-unit.url | uri | 1..1 |
| Extension.extension:metric-unit.value[x]:valueCodeableConcept | CodeableConcept | 0..1 |
| Extension.url | uri | 1..1 |
| Extension.value[x] | Address | Age | Annotation | Attachment | base64Binary | boolean | code | CodeableConcept | Coding | ContactPoint | Count | date | dateTime | decimal | Distance | Duration | HumanName | id | Identifier | instant | integer | markdown | Meta | Money | oid | Period | positiveInt | Quantity | Range | Ratio | Reference | SampledData | Signature | string | time | Timing | unsignedInt | uri | 0..0 |