When the application deployer defines a new version of an application to the Application Assembler, the Application Assembler automatically creates a component update file for each component whose new version contains changed application files. Each component update file represents the delta (difference) between the new version of a component and the previous version of the same component.

When WebClient on the end user's machine determines that the end user's application needs updating, WebClient downloads the necessary component update files to update the end user's installation to the newest version. For more information, see Deploying an Application