windows-itpro-docs/mdop/appv-v4/exclusion-item-dialog-box.md
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---
title: Exclusion Item Dialog Box
description: Exclusion Item Dialog Box
author: jamiejdt
ms.assetid: 5523c6d4-95f2-47af-8c06-3ab18004a207
ms.pagetype: mdop, appcompat, virtualization
ms.mktglfcycl: deploy
ms.sitesec: library
ms.prod: w8
ms.date: 06/16/2016
---
# Exclusion Item Dialog Box
Use the **Exclusion Item** dialog box to assign or change a mapping rule and to assign or change an expression for exclusion. This dialog box contains the following elements.
**Important**  
Adding files from an excluded directory to the virtual files system is not supported.
 
<a href="" id="exclude-path"></a>**Exclude Path**
Use to specify variable name that the Application Virtualization Sequencer will exclude if encountered while parsing virtual file system items or virtual registry items.
<a href="" id="mapping-type"></a>**Mapping Type**
Use to select the mapping rules the Application Virtualization Sequencer will apply to parse items in the virtual file system or virtual registry. One of the following values can occur:
- VRG—Specifies that this mapping rule applies when parsing an item in the virtual registry.
- VFS—Specifies that this mapping rule applies when parsing an item in the virtual file system.
- VRG & VFS—Specifies that this mapping rule applies when parsing an item in either the virtual file system or the virtual registry.
## Related topics
[Sequencer Dialog Boxes](sequencer-dialog-boxes.md)