Hi, all, One question, I am trying to look at the source code of XWikiPreferences class, AdminSheet class, but after I searched Data Type, I got a lot of classes back, I clicked on these two classes, it always shows the rendering result, I have no way to look at the velocity code behind the classes, but other classes like BlogClass, I can go inside the BlogSheet and use Edit button - Wiki to see the velocty code, why for these two classes I cannot see the code, any ideas? Thanks Dave