PluginEdit online A plugin (also referred to as add-on or extension) is a component that adds specific features to an existing application. Oxygen XML Developer supports plugins to enable numerous customizations.For more information, see the following topics: Installing and Updating Add-ons Automatic and Manual Methods for Installing Plugins Packing and Deploying Plugins as Add-ons Add-ons Preferences Extending Oxygen XML Developer with Plugins General Configuration of an Oxygen XML Developer Plugin