# HealthEvidenceSource

[All API schemas](/api-reference/schemas/)

Exactly one of: <code>object</code>; <code>object</code>

| Field | Required at this level | Type | Description and constraints |
| --- | --- | --- | --- |
| <code>oneOf&#91;1&#93;.generation</code> | Yes | Constant <code>V1</code> | — |
| <code>oneOf&#91;1&#93;.recordType</code> | Yes | <code>string</code> | Pattern: <code>^&#91;a-zA-Z0-9&#93;&#91;a-zA-Z0-9:&#95;-&#93;{2,159}$</code> |
| <code>oneOf&#91;1&#93;.recordId</code> | Yes | <code>string</code> | Pattern: <code>^&#91;a-zA-Z0-9&#93;&#91;a-zA-Z0-9:&#95;-&#93;{2,159}$</code> |
| <code>oneOf&#91;1&#93;.updatedAt</code> | Yes | <code>string</code> | Format: <code>date-time</code> |
| <code>oneOf&#91;1&#93;.copiedPayloadHash</code> | Yes | <code>string</code> | Pattern: <code>^0x&#91;0-9a-f&#93;{64}$</code> |
| <code>oneOf&#91;2&#93;.generation</code> | Yes | Constant <code>V2</code> | — |
| <code>oneOf&#91;2&#93;.recordType</code> | Yes | <code>string</code> | Pattern: <code>^&#91;a-zA-Z0-9&#93;&#91;a-zA-Z0-9:&#95;-&#93;{2,159}$</code> |
| <code>oneOf&#91;2&#93;.recordId</code> | Yes | <code>string</code> | Pattern: <code>^&#91;a-zA-Z0-9&#93;&#91;a-zA-Z0-9:&#95;-&#93;{2,159}$</code> |
| <code>oneOf&#91;2&#93;.resourceVersion</code> | Yes | <code>string</code> | Pattern: <code>^0x&#91;0-9a-f&#93;{64}$</code> |
| <code>oneOf&#91;2&#93;.artifactHash</code> | Yes | <code>string</code> | Pattern: <code>^0x&#91;0-9a-f&#93;{64}$</code> |

Nested required fields apply when their parent object or matching union branch is present. Named types link to their complete schema.

Exact definition: <code>#/components/schemas/HealthEvidenceSource</code> in the [OpenAPI contract](/openapi/liquidity-operating-system-v2.openapi.json).