| Source Element | Usage | Target |
| Attachment.id | UseElementSameName | Attachment.id |
| Attachment.extension | UseElementSameName | Attachment.extension |
| Attachment.contentType | UseElementSameName | Attachment.contentType |
| Attachment.language | UseElementSameName | Attachment.language |
| Attachment.data | UseElementSameName | Attachment.data |
| Attachment.url | UseElementSameName | Attachment.url |
| Attachment.size | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-Attachment.size |
| Attachment.hash | UseElementSameName | Attachment.hash |
| Attachment.title | UseElementSameName | Attachment.title |
| Attachment.creation | UseElementSameName | Attachment.creation |
| Attachment.height | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-Attachment.height |
| Attachment.width | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-Attachment.width |
| Attachment.frames | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-Attachment.frames |
| Attachment.duration | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-Attachment.duration |
| Attachment.pages | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-Attachment.pages |