| Source Element | Usage | Target |
| ServiceDefinition | UseExtension | http://hl7.org/fhir/3.0/StructureDefinition/extension-ServiceDefinition |
| ServiceDefinition.id | UseExtensionFromAncestor | - |
| ServiceDefinition.meta | UseExtensionFromAncestor | - |
| ServiceDefinition.implicitRules | UseExtensionFromAncestor | - |
| ServiceDefinition.language | UseExtensionFromAncestor | - |
| ServiceDefinition.text | UseExtensionFromAncestor | - |
| ServiceDefinition.contained | UseExtensionFromAncestor | - |
| ServiceDefinition.extension | UseExtensionFromAncestor | - |
| ServiceDefinition.modifierExtension | UseExtensionFromAncestor | - |
| ServiceDefinition.url | UseExtensionFromAncestor | - |
| ServiceDefinition.identifier | UseExtensionFromAncestor | - |
| ServiceDefinition.version | UseExtensionFromAncestor | - |
| ServiceDefinition.name | UseExtensionFromAncestor | - |
| ServiceDefinition.title | UseExtensionFromAncestor | - |
| ServiceDefinition.status | UseExtensionFromAncestor | - |
| ServiceDefinition.experimental | UseExtensionFromAncestor | - |
| ServiceDefinition.date | UseExtensionFromAncestor | - |
| ServiceDefinition.publisher | UseExtensionFromAncestor | - |
| ServiceDefinition.description | UseExtensionFromAncestor | - |
| ServiceDefinition.purpose | UseExtensionFromAncestor | - |
| ServiceDefinition.usage | UseExtensionFromAncestor | - |
| ServiceDefinition.approvalDate | UseExtensionFromAncestor | - |
| ServiceDefinition.lastReviewDate | UseExtensionFromAncestor | - |
| ServiceDefinition.effectivePeriod | UseExtensionFromAncestor | - |
| ServiceDefinition.useContext | UseExtensionFromAncestor | - |
| ServiceDefinition.jurisdiction | UseExtensionFromAncestor | - |
| ServiceDefinition.topic | UseExtensionFromAncestor | - |
| ServiceDefinition.contributor | UseExtensionFromAncestor | - |
| ServiceDefinition.contact | UseExtensionFromAncestor | - |
| ServiceDefinition.copyright | UseExtensionFromAncestor | - |
| ServiceDefinition.relatedArtifact | UseExtensionFromAncestor | - |
| ServiceDefinition.trigger | UseExtensionFromAncestor | - |
| ServiceDefinition.dataRequirement | UseExtensionFromAncestor | - |
| ServiceDefinition.operationDefinition | UseExtensionFromAncestor | - |