# Access enum

Namespace: [Grasshopper2.Parameters](https://developer.rhino3d.com/api/gh2/namespace/grasshopper2.parameters.md) · Assembly: [Grasshopper2](https://developer.rhino3d.com/api/gh2/assembly/grasshopper2.md)

```cs
public enum Access
```

Enumerates the possible access levels parameters can have vis-a-vis their volatile data.

## Values

| Name | Value | Description |
| --- | --- | --- |
| Item | 0 | Access is provided on a per-item basis. |
| Twig | 1 | Access is provided to entire tree twigs including meta data and null states. |
| Tree | 2 | Access to the entire data tree is provided at once. |