> ## Documentation Index
> Fetch the complete documentation index at: https://docs.extractbase.com/llms.txt
> Use this file to discover all available pages before exploring further.

# @oneOf

Indicates exactly one field must be supplied and this field must not be `null`.

## Definition

```graphql theme={null}
directive @oneOf on INPUT_OBJECT
```

## Locations

* `INPUT_OBJECT`