| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Surface area of ulcer (observable entity) | Is a | True | Ulcer observable (observable entity) | Inferred relationship | Some |  | 
| Pressure ulcer index value | Is a | False | Ulcer observable (observable entity) | Inferred relationship | Some |  | 
| Number of ulcers | Is a | True | Ulcer observable (observable entity) | Inferred relationship | Some |  | 
| University of Texas Wound Classification System grade | Is a | True | Ulcer observable (observable entity) | Inferred relationship | Some |  | 
| University of Texas Wound Classification System stage | Is a | True | Ulcer observable (observable entity) | Inferred relationship | Some |  | 
| Perfusion, Extent, Depth, Infection and Sensation scoring system score (observable entity) | Is a | True | Ulcer observable (observable entity) | Inferred relationship | Some |  | 
| Site, Ischemia, Neuropathy, Bacterial Infection and Depth classification total score (observable entity) | Is a | True | Ulcer observable (observable entity) | Inferred relationship | Some |  | 
| Depth, Extent, Phase and Associated etiology Score (observable entity) | Is a | True | Ulcer observable (observable entity) | Inferred relationship | Some |  | 
| Size (area, depth), Sepsis, Arteriopathy, Denervation system score (observable entity) | Is a | True | Ulcer observable (observable entity) | Inferred relationship | Some |  | 
| Maelor Scale total score (observable entity) | Is a | True | Ulcer observable (observable entity) | Inferred relationship | Some |  | 
| European pressure ulcer advisory panel classification | Is a | True | Ulcer observable (observable entity) | Inferred relationship | Some |  | 
| Pressure Ulcer Scale for Healing score (observable entity) | Is a | True | Ulcer observable (observable entity) | Inferred relationship | Some |  |