Hi Guys, I am working on XE-14 (the new Administration UI) http://dev.xwiki.org/xwiki/bin/view/Design/ImproveWikiAdministration . Since the admin templates will be deleted and replaced by an AdminSheet which will be included by default in XwikiPreferences (wiki level) and WebPreferences (space level), I need to create the WebPreferences document for each space, attach an Xwiki.XwikiPreferences object to it and include the AdminSheet. To do that, I need to write some java code in the core . So , here's my proposal: - At xwiki intitialization create all the WebPreferences for the currently existing spaces in the wiki (this should be done for all the wikis, if in a multi-wiki). - Then, use a notification system to create the WebPreferences for any new space in the wiki in one of two ways: a) When calling the "view" action on AnySpace.WebPreferences, check if it exists, if not create it, attach the obj. and include the sheet b) When calling the "save" action on AnySpace.AnyDoc, check if AnySpace.WebPreferences exists, if not, create it etc. I am for the second one, since the 'view' is much more often performed than 'save'. So, my questions: what should I use for the notifications? I found this function in the Stats notification system: // Adding the rule which will allow this module to be called on each page view context.getWiki().getNotificationManager().addGeneralRule( new XWikiActionRule(this, true, true)); But Thomas said the method above registers all types of notifs, not only on page view. There is also: notify(XWikiNotificationRule rule, XWikiDocument doc, String action, XWikiContext context) and I can perform an if(action == "save") to use the notif system for the "save" action. Thomas Mortagne also told me that this notif system is a little bit outdated and would be replaced by the observation component, but I have no idea which I should use. Also, according to the specifs in the draft above, so far I created the Xwiki.AdminSheet, that will display the main categories (General, Presentation, Rights, Users, Groups, Import/Export etc). For each section of this menu I created a sheet (General - > Xwiki.GeneralSheet etc.) in which I can personalize the display. I also created Xwiki.AdminSectionSheet which contains the common code to display the fields necessary from the Xwiki.XwikiPreferences object and this sheet will be included in the sections where is needed (Genera, Presentation etc.) The reason I created separated sheets for each section of the menu (which are fixed as number) is to keep the code clean and allow the possibility to display something else than fields from the xwiki prefs. object (for example for rights, users, groups, import/export). I would really really appreciate some feedback for this 2 proposals. Thanks, Evelina