| # | Name | Source | Ver | Description | |
| 1 | OperationOutcome Authority for Rule | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | A reference to where the rule is defined (based on the authoritative URLs in the applicable conformance resources). | |
| 2 | OperationOutcome Column of Issue | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | Identifies the source column for the issue | |
| 3 | OperationOutcome Detected Clinical Issue | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | A reference to a stored contraindication that is the basis for this issue. A recipient can expect that the item referenced in this extension is being retained for record keeping purposes. | |
| 4 | OperationOutcome Line of Issue | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | Identifies the source line of the issue | |
| 5 | OperationOutcome Message ID | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | Identifies the id of the source message used to construct the actual error message | |
| 6 | OperationOutcome Source File | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | Identifies the source file where the issue is found (when there are multiple source files) | |
| 7 | OperationOutcome Source of Issue | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | Identifies the logical module/software section responsible for identifying the issue |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
| Extension | C D | C D | C D | C D | C D | C D | C D |
| Extension.extension | C | C | C | C | C | C | C |
| Extension.url | F | F | F | F | F | F | F |
| Extension.value[x] | C | C | C | C | C | C | C |
Produced 06 Apr 2023