XOPGI include all general Merchise 'OpenERP'' addons.
The name XOPGI comes from Progiciel Libre de Gestion Intégré, in french "Free Software for Integrated Management". The word "Libre" is changed for "Open". The term is similar to OpenERP in french.
This module never will be installed manually, it will be used automatically for all XOPGI's dependant components.