The WebServiceExtension property is used by the Web server to determine whether a Web service extension is permitted to run. Extensibility point in the WiX XML Schema. Schema extensions can register additional elements at this point in the schema. Identifier for the web service extension. Used within the MSI package only. If the Id is not specified, it will be generated. Usually a Property that resolves to short file name path Description of the extension. String used to identify groups of extensions. Indicates if the extension is allowed or denied. Indicates if the UI is allowed to delete the extension from the list of not. Default: Not deletable. Extensibility point in the WiX XML Schema. Schema extensions can register additional attributes at this point in the schema.