This code system http://hl7.org/fhir/concept-properties defines the following codes:
| Code | Display | Definition |
| inactive | Inactive | True if the concept is not considered active - e.g. not a valid concept any more. Property type is boolean, default value is false |
| deprecated | Deprecated | The date at which a concept was deprecated. Concepts that are deprecated but not inactive can still be used, but their use is discouraged, and they should be expected to be made inactive in a future release. Property type is dateTime |
| notSelectable | Not Selectable | The concept is not intended to be chosen by the user - only intended to be used as a selector for other concepts. Note, though, that the interpretation of this is highly contextual; all concepts are selectable in some context. Property type is boolean |
| parent | Parent | The concept identified in this property is a parent of the concept on which it is a property. The property type will be 'code'. The meaning of 'parent' is defined by the hierarchyMeaning attribute |
| child | Child | The concept identified in this property is a child of the concept on which it is a property. The property type will be 'code'. The meaning of 'child' is defined by the hierarchyMeaning attribute |