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

# FormatDocument

A document being edited, handed to every FileFormat callback. Exactly one
of `text` (text documents) or `bytes` (binary documents) is set. Positions
reported back to Rive are 0-based byte offsets into `text`.

## Fields

### `name`

Display name of the document, e.g. "readme".

### `extension`

File extension of the document without the dot, e.g. "md".

### `text`

Full document text, nil for binary documents.

### `bytes`

Document bytes, nil for text documents.