# EditCollectionMemberInput

input type

Edit-input for a CollectionMember. Every field optional, at least ONE required; supplied fields REPLACE, omitted fields are preserved (no clearing semantic yet). productId is NOT editable (IMMUTABLE membership identity, RC-o — re-point = doom + create; the uniqueness marker never swaps).

## Fields

| Field | Type | Required | Notes |
| --- | --- | --- | --- |
| `caption` | [String](/types/#scalars) | no | No further notes. |
| `ordinal` | [Int](/types/#scalars) | no | The replacement display order (LOWER = FIRST; 0..1000000). |

## Used by

- [updateCollectionMember](/reference/collection-member/updateCollectionMember/)