This is the Continuous Integration Build of FHIR (will be incorrect/inconsistent at times).
See the Directory of published versions 
11.4.9 Resource DeviceDefinition - Mappings
Mappings for the DeviceDefinition resource (see Mappings to Other Standards for further information & status).
| DeviceDefinition | administrative.device |
| url | FiveWs.identifier |
| identifier | FiveWs.identifier |
| version | FiveWs.version |
| status | FiveWs.status |
| experimental | FiveWs.class |
| date | FiveWs.recorded |
| publisher | FiveWs.witness |
| purpose | FiveWs.why[x] |
| approvalDate | FiveWs.recorded |
| lastReviewDate | FiveWs.recorded |
| effectivePeriod | FiveWs.done[x] |
| partNumber | FiveWs.what[x] |
| manufacturer | FiveWs.what[x] |
| modelNumber | FiveWs.what[x] |
| type | FiveWs.what[x] |
| component | FiveWs.what[x] |
| DeviceDefinition | |
| partNumber | .playedRole[typeCode=MANU].id |
| manufacturer | .playedRole[typeCode=MANU].scoper.name |
| modelNumber | .softwareName (included as part) |
| type | .playedRole[typeCode=MANU].code |
| note | .text |