# Event

The Event object is of type *PsObject* and represents the registration to a specific [Vault API event](</code_reference/commandlets/register-vaultevent>) or Vault Client [Tab action](</code_reference/commandlets/add-vaulttab>).

## Syntax

```powershell
$event.SourceIdentifier
```

Following properties are available :

| Type                     | Name             | Description                                                                                                                                                                                 |
|--------------------------|------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| String                   | Name             | The name of the registered event. For Vault API events this is the corresponding [VaultEvent](</code_reference/objects/event_mappings>) name, for tabs *'TabSelectionChanged'* is returned. |
| String                   | SourceIdentifier | Unique string which represents the registered event. Required for [](</code_reference/commandlets/unregister-vaultevent>).                                                                  |
| String / [ScriptBlock][] | Command          | The PowerShell script which is executed when the event is fired.                                                                                                                            |

  [ScriptBlock]: https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_script_blocks

## Examples

**Registered event with Command specified as function name**

```powershell
Name             : UpdateFileStates_Restrictions
SourceIdentifier : 6090dbfa-bbb4-4d31-becf-4b63c8111a4f
Command          : CanTriggerDwfJob
```

**Properties of an event with Command specified as script block**

```powershell
Name             : UpdateFileStates_Post
SourceIdentifier : f4e99f68-fcfb-4d1c-b0df-4ae5611de2b6

Command          : {
	           param()
	           write-host 'This script block is executed when the Vault event is raised!'
	           }
```