Observation.component 
Some observations have multiple component observations. These component observations are expressed as separate code value pairs that share the same attributes. Examples include systolic and diastolic component observations for blood pressure measurement and multiple component observations for genetics observations.
= Must Support, = Is Modifier, = QiCore defined extension
| Field | Card. | Type | Description |
|---|---|---|---|
| code | 1..1 | Concept | Describes what was observed. Sometimes this is called the observation "code". Binding: Codes identifying names of simple observations. (example) |
| value[x] | 0..1 | Quantity | Concept | String | Boolean | Integer | Interval<Quantity> | Ratio | SampledData | Time | DateTime | Interval<DateTime> | The information determined as a result of making the observation, if the information has a simple value. |
| dataAbsentReason | 0..1 | Concept | Provides a reason why the expected value in the element Observation.component.value[x] is missing. Binding: Codes specifying why the result (`Observation.value[x]`) is missing. (extensible) |
| interpretation | 0..* | List<Concept> | A categorical assessment of an observation value. For example, high, low, normal. Binding: Codes identifying interpretations of observations. (extensible) |
| referenceRange | 0..* | List<referenceRange> | Guidance on how to interpret the value by comparison to a normal or recommended range. |