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

# AssetCollection.to_fields

```python theme={"system"}
def AssetCollection.to_fields(
    *,
    fields: AssetFieldNames | None = None,
    storage: Storage | None = None,
    authentication: Authentication | None = None,
) -> dict[str, Assets | Storage | Authentication]
```

Convert the collection to fields ready for dataset ingestion.

## Parameters

<ParamField path="fields" type="AssetFieldNames | None">
  Optional output names for the assets, storage, and authentication fields.
</ParamField>

<ParamField path="storage" type="Storage | None">
  Additional storage registry entries to retain.
</ParamField>

<ParamField path="authentication" type="Authentication | None">
  Additional authentication registry entries to retain.
</ParamField>

## Returns

A field-name mapping containing `Assets` and any nonempty `Storage` or `Authentication` fields.