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# USDLayer.ListOperationType

Identifies an operation slot in a [`USDLayer.ListOperation`](/documentation/USDKit/USDLayer/ListOperation).

```
enum ListOperationType
```

## Topics

### Enumeration Cases

[`case appended`](/documentation/USDKit/USDLayer/ListOperationType/appended)

Items added to the back.

[`case deleted`](/documentation/USDKit/USDLayer/ListOperationType/deleted)

Items to remove during composition.

[`case explicit`](/documentation/USDKit/USDLayer/ListOperationType/explicit)

Items that replace the entire list.

[`case prepended`](/documentation/USDKit/USDLayer/ListOperationType/prepended)

Items added to the front.

## Relationships

### Conforms To

[`Equatable`](/documentation/Swift/Equatable)

[`Hashable`](/documentation/Swift/Hashable)

---

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