| Source Element | Usage | Target |
| SubscriptionTopic | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-SubscriptionTopic |
| SubscriptionTopic.id | UseExtensionFromAncestor | - |
| SubscriptionTopic.meta | UseExtensionFromAncestor | - |
| SubscriptionTopic.implicitRules | UseExtensionFromAncestor | - |
| SubscriptionTopic.language | UseExtensionFromAncestor | - |
| SubscriptionTopic.text | UseExtensionFromAncestor | - |
| SubscriptionTopic.contained | UseExtensionFromAncestor | - |
| SubscriptionTopic.extension | UseExtensionFromAncestor | - |
| SubscriptionTopic.modifierExtension | UseExtensionFromAncestor | - |
| SubscriptionTopic.url | UseExtensionFromAncestor | - |
| SubscriptionTopic.identifier | UseExtensionFromAncestor | - |
| SubscriptionTopic.version | UseExtensionFromAncestor | - |
| SubscriptionTopic.versionAlgorithm[x] | UseExtensionFromAncestor | - |
| SubscriptionTopic.name | UseExtensionFromAncestor | - |
| SubscriptionTopic.title | UseExtensionFromAncestor | - |
| SubscriptionTopic.derivedFrom | UseExtensionFromAncestor | - |
| SubscriptionTopic.status | UseExtensionFromAncestor | - |
| SubscriptionTopic.experimental | UseExtensionFromAncestor | - |
| SubscriptionTopic.date | UseExtensionFromAncestor | - |
| SubscriptionTopic.publisher | UseExtensionFromAncestor | - |
| SubscriptionTopic.contact | UseExtensionFromAncestor | - |
| SubscriptionTopic.description | UseExtensionFromAncestor | - |
| SubscriptionTopic.useContext | UseExtensionFromAncestor | - |
| SubscriptionTopic.jurisdiction | UseExtensionFromAncestor | - |
| SubscriptionTopic.purpose | UseExtensionFromAncestor | - |
| SubscriptionTopic.copyright | UseExtensionFromAncestor | - |
| SubscriptionTopic.copyrightLabel | UseExtensionFromAncestor | - |
| SubscriptionTopic.approvalDate | UseExtensionFromAncestor | - |
| SubscriptionTopic.lastReviewDate | UseExtensionFromAncestor | - |
| SubscriptionTopic.effectivePeriod | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.id | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.extension | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.modifierExtension | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.description | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.resource | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.supportedInteraction | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.queryCriteria | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.queryCriteria.id | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.queryCriteria.extension | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.queryCriteria.modifierExtension | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.queryCriteria.previous | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.queryCriteria.resultForCreate | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.queryCriteria.current | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.queryCriteria.resultForDelete | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.queryCriteria.requireBoth | UseExtensionFromAncestor | - |
| SubscriptionTopic.resourceTrigger.fhirPathCriteria | UseExtensionFromAncestor | - |
| SubscriptionTopic.eventTrigger | UseExtensionFromAncestor | - |
| SubscriptionTopic.eventTrigger.id | UseExtensionFromAncestor | - |
| SubscriptionTopic.eventTrigger.extension | UseExtensionFromAncestor | - |
| SubscriptionTopic.eventTrigger.modifierExtension | UseExtensionFromAncestor | - |
| SubscriptionTopic.eventTrigger.description | UseExtensionFromAncestor | - |
| SubscriptionTopic.eventTrigger.event | UseExtensionFromAncestor | - |
| SubscriptionTopic.eventTrigger.resource | UseExtensionFromAncestor | - |
| SubscriptionTopic.canFilterBy | UseExtensionFromAncestor | - |
| SubscriptionTopic.canFilterBy.id | UseExtensionFromAncestor | - |
| SubscriptionTopic.canFilterBy.extension | UseExtensionFromAncestor | - |
| SubscriptionTopic.canFilterBy.modifierExtension | UseExtensionFromAncestor | - |
| SubscriptionTopic.canFilterBy.description | UseExtensionFromAncestor | - |
| SubscriptionTopic.canFilterBy.resource | UseExtensionFromAncestor | - |
| SubscriptionTopic.canFilterBy.filterParameter | UseExtensionFromAncestor | - |
| SubscriptionTopic.canFilterBy.filterDefinition | UseExtensionFromAncestor | - |
| SubscriptionTopic.canFilterBy.comparator | UseExtensionFromAncestor | - |
| SubscriptionTopic.canFilterBy.modifier | UseExtensionFromAncestor | - |
| SubscriptionTopic.notificationShape | UseExtensionFromAncestor | - |
| SubscriptionTopic.notificationShape.id | UseExtensionFromAncestor | - |
| SubscriptionTopic.notificationShape.extension | UseExtensionFromAncestor | - |
| SubscriptionTopic.notificationShape.modifierExtension | UseExtensionFromAncestor | - |
| SubscriptionTopic.notificationShape.resource | UseExtensionFromAncestor | - |
| SubscriptionTopic.notificationShape.include | UseExtensionFromAncestor | - |
| SubscriptionTopic.notificationShape.revInclude | UseExtensionFromAncestor | - |