Group for all kinds of (usergroup) things. When it is not nested under a component it is included in the MSI so it can be referenced by other elements such as the GroupRef element under a User element (to add the User to the Group). When it is nested under a Component element, the Group will be created on install and can also be used for reference. Extensibility point in the WiX XML Schema. Schema extensions can register additional elements at this point in the schema. Unique identifier in your installation package for this group. A [Formatted](https://learn.microsoft.com/en-us/windows/win32/msi/formatted) string that contains the name of the group. An optional [Formatted](https://learn.microsoft.com/en-us/windows/win32/msi/formatted) string that specifies the domain for the group. Indicates whether the group should be removed or left behind on uninstall. Indicates if the install should fail if the group already exists. Indicates if the group properties should be updated if the group already exists. Indicates whether or not to create the group. Group creation can be skipped if all that is desired is to add group memberships. Indicates whether failure to create the group or add the group to another group fails the installation. The default value is "yes". Optional comment to set on the group. Indicates whether remove the comment from the group. The default value is "no". Extensibility point in the WiX XML Schema. Schema extensions can register additional attributes at this point in the schema.