Hello, Please, i have two problems : 1) i try to add an object using this code ## Create an object #set($obj = $doc.newObject("XWiki.SomeClass")) $obj.set("field1","value1") $obj.set("field2","value2") ## Save the object in the page $doc.save() but when I click on "save and view", the values I have set for my fields are not saved, the fields of the object are empty; Moreover, when I add a second object, there are only the first that is displayed on the page. 2) I would like to create corresponding objects to my XCLASS ( For example i have create xClass Environment, Brick ...), a Xclass Environment contains a list of bricks ( i would like to add such property List<Brick> bricks to an object of EnvironmentClass...). In fact, I would like to create my data model in order to use it in my pages. I want to know how to create a List property <Brick> for example or in general List<Xclass>. Thanks. This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message.