| Source Element | Usage | Target |
| SubscriptionStatus | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-SubscriptionStatus |
| SubscriptionStatus.id | UseExtensionFromAncestor | - |
| SubscriptionStatus.meta | UseExtensionFromAncestor | - |
| SubscriptionStatus.implicitRules | UseExtensionFromAncestor | - |
| SubscriptionStatus.language | UseExtensionFromAncestor | - |
| SubscriptionStatus.text | UseExtensionFromAncestor | - |
| SubscriptionStatus.contained | UseExtensionFromAncestor | - |
| SubscriptionStatus.extension | UseExtensionFromAncestor | - |
| SubscriptionStatus.modifierExtension | UseExtensionFromAncestor | - |
| SubscriptionStatus.status | UseExtensionFromAncestor | - |
| SubscriptionStatus.type | UseExtensionFromAncestor | - |
| SubscriptionStatus.eventsSinceSubscriptionStart | UseExtensionFromAncestor | - |
| SubscriptionStatus.notificationEvent | UseExtensionFromAncestor | - |
| SubscriptionStatus.notificationEvent.id | UseExtensionFromAncestor | - |
| SubscriptionStatus.notificationEvent.extension | UseExtensionFromAncestor | - |
| SubscriptionStatus.notificationEvent.modifierExtension | UseExtensionFromAncestor | - |
| SubscriptionStatus.notificationEvent.eventNumber | UseExtensionFromAncestor | - |
| SubscriptionStatus.notificationEvent.timestamp | UseExtensionFromAncestor | - |
| SubscriptionStatus.notificationEvent.focus | UseExtensionFromAncestor | - |
| SubscriptionStatus.notificationEvent.additionalContext | UseExtensionFromAncestor | - |
| SubscriptionStatus.subscription | UseExtensionFromAncestor | - |
| SubscriptionStatus.topic | UseExtensionFromAncestor | - |
| SubscriptionStatus.error | UseExtensionFromAncestor | - |