| Name | Based On | Definition |
| ObservationStatement | Observation | A base class for representing observed facts, including provenance |
| WoundAssertion | Observation | Assertion of the existence of a wound on a patient |
| WoundAssessment | Observation | LOINC 39135-9 (Wound assessment panel) |
| WoundBed | Observation |
|
| WoundEdge | Observation |
|
| WoundExudate | Observation |
|
| WoundSiteIdentification | Observation | LOINC 72369-2 (Body site identification panel) |
| WoundSize | Observation |
|
| WoundTunneling | Observation | LOINC 89257-0 (Wound tunneling panel) |
| WoundUndermining | Observation | LOINC 89258-8 (Wound undermining panel) |