# GH_ParamHashFields enum

Namespace: [Grasshopper.Kernel](https://developer.rhino3d.com/api/gh1/namespace/grasshopper.kernel.md) · Assembly: [Grasshopper](https://developer.rhino3d.com/api/gh1/assembly/grasshopper.md)

```cs
[Flags]
public enum GH_ParamHashFields
```

Enumerates all accepted fields for hashing parameter data.

## Values

| Name | Value | Description |
| --- | --- | --- |
| None | 0 | Represents a blank hash. |
| Input | 1 | Input parameters are taken into account. |
| Output | 2 | Output parameters are taken into account. |
| InputAndOutput | 3 | Input and output parameters are taken into account. |
| InstanceId | 4 | Parameter instance ID is taken into account. |
| NickName | 8 | Parameter nickname is taken into account. |
| Access | 16 | Parameter access (item, list, tree) is taken into account. |
| TypeId | 32 | Parameter type code is taken into account. |
| PersistentData | 64 | Parameter persistent data is taken into account. |
| Expression | 128 | Parameter Expression is taken into account. |
| TypeHint | 256 | Parameter typehint is taken into account. |
| Sources | 65536 | Parameter source IDs are taken into account. |
| Recipients | 131072 | Parameter recipient IDs are taken into account. |
| SourcesAndRecipients | 196608 | Parameter sources and recipients are taken into account. |
| SerialData | 16777216 | Parameter serialization byte array is taken into account. |
| All | 16974335 |  |