| Source Element | Usage | Target |
| ConditionDefinition | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ConditionDefinition |
| ConditionDefinition.id | UseExtensionFromAncestor | - |
| ConditionDefinition.meta | UseExtensionFromAncestor | - |
| ConditionDefinition.implicitRules | UseExtensionFromAncestor | - |
| ConditionDefinition.language | UseExtensionFromAncestor | - |
| ConditionDefinition.text | UseExtensionFromAncestor | - |
| ConditionDefinition.contained | UseExtensionFromAncestor | - |
| ConditionDefinition.extension | UseExtensionFromAncestor | - |
| ConditionDefinition.modifierExtension | UseExtensionFromAncestor | - |
| ConditionDefinition.url | UseExtensionFromAncestor | - |
| ConditionDefinition.identifier | UseExtensionFromAncestor | - |
| ConditionDefinition.version | UseExtensionFromAncestor | - |
| ConditionDefinition.versionAlgorithm[x] | UseExtensionFromAncestor | - |
| ConditionDefinition.name | UseExtensionFromAncestor | - |
| ConditionDefinition.title | UseExtensionFromAncestor | - |
| ConditionDefinition.subtitle | UseExtensionFromAncestor | - |
| ConditionDefinition.status | UseExtensionFromAncestor | - |
| ConditionDefinition.experimental | UseExtensionFromAncestor | - |
| ConditionDefinition.date | UseExtensionFromAncestor | - |
| ConditionDefinition.publisher | UseExtensionFromAncestor | - |
| ConditionDefinition.contact | UseExtensionFromAncestor | - |
| ConditionDefinition.description | UseExtensionFromAncestor | - |
| ConditionDefinition.useContext | UseExtensionFromAncestor | - |
| ConditionDefinition.jurisdiction | UseExtensionFromAncestor | - |
| ConditionDefinition.code | UseExtensionFromAncestor | - |
| ConditionDefinition.severity | UseExtensionFromAncestor | - |
| ConditionDefinition.bodySite | UseExtensionFromAncestor | - |
| ConditionDefinition.stage | UseExtensionFromAncestor | - |
| ConditionDefinition.hasSeverity | UseExtensionFromAncestor | - |
| ConditionDefinition.hasBodySite | UseExtensionFromAncestor | - |
| ConditionDefinition.hasStage | UseExtensionFromAncestor | - |
| ConditionDefinition.definition | UseExtensionFromAncestor | - |
| ConditionDefinition.observation | UseExtensionFromAncestor | - |
| ConditionDefinition.observation.id | UseExtensionFromAncestor | - |
| ConditionDefinition.observation.extension | UseExtensionFromAncestor | - |
| ConditionDefinition.observation.modifierExtension | UseExtensionFromAncestor | - |
| ConditionDefinition.observation.category | UseExtensionFromAncestor | - |
| ConditionDefinition.observation.code | UseExtensionFromAncestor | - |
| ConditionDefinition.medication | UseExtensionFromAncestor | - |
| ConditionDefinition.medication.id | UseExtensionFromAncestor | - |
| ConditionDefinition.medication.extension | UseExtensionFromAncestor | - |
| ConditionDefinition.medication.modifierExtension | UseExtensionFromAncestor | - |
| ConditionDefinition.medication.category | UseExtensionFromAncestor | - |
| ConditionDefinition.medication.code | UseExtensionFromAncestor | - |
| ConditionDefinition.precondition | UseExtensionFromAncestor | - |
| ConditionDefinition.precondition.id | UseExtensionFromAncestor | - |
| ConditionDefinition.precondition.extension | UseExtensionFromAncestor | - |
| ConditionDefinition.precondition.modifierExtension | UseExtensionFromAncestor | - |
| ConditionDefinition.precondition.type | UseExtensionFromAncestor | - |
| ConditionDefinition.precondition.code | UseExtensionFromAncestor | - |
| ConditionDefinition.precondition.value[x] | UseExtensionFromAncestor | - |
| ConditionDefinition.team | UseExtensionFromAncestor | - |
| ConditionDefinition.questionnaire | UseExtensionFromAncestor | - |
| ConditionDefinition.questionnaire.id | UseExtensionFromAncestor | - |
| ConditionDefinition.questionnaire.extension | UseExtensionFromAncestor | - |
| ConditionDefinition.questionnaire.modifierExtension | UseExtensionFromAncestor | - |
| ConditionDefinition.questionnaire.purpose | UseExtensionFromAncestor | - |
| ConditionDefinition.questionnaire.reference | UseExtensionFromAncestor | - |
| ConditionDefinition.plan | UseExtensionFromAncestor | - |
| ConditionDefinition.plan.id | UseExtensionFromAncestor | - |
| ConditionDefinition.plan.extension | UseExtensionFromAncestor | - |
| ConditionDefinition.plan.modifierExtension | UseExtensionFromAncestor | - |
| ConditionDefinition.plan.role | UseExtensionFromAncestor | - |
| ConditionDefinition.plan.reference | UseExtensionFromAncestor | - |