[xwiki-users] How to capitalize on XWiki Classes, Objects, and Properties at presentation level?

I went thru XWiki Classes, Objects, and Properties topic given at http://platform.xwiki.org/xwiki/bin/view/DevGuide/DataModel. I understand the concept of Classes, Objects, and Properties as i am familiar with java. Here is the statement given at the same link *This area explains XWiki's data model of Classes, Properties, and Objects for those users who want to build applications primarily at the presentation level. (which makes it second generation wiki). It will help you understand how you can achieve significant features by programming at this level alone.* Basically i want to understand how i can capitalize the concept of Classes, Properties, and Object at presentation level. To understand this throrouly i created two scenarios:- First i created the space MySpace and created two pages i.e page1 under this space. here are th scenarios scenario1:- i edit the class MySpace.page1 and added a property password ang gave some values for field Name, Pretty Name,Custom Display etc and saved it. *But i did not see any change at presentation level of MySpace.page1.* scenario1:- Similarily i edit the objects for MySpace.page1 and added a class mail ang gave some values for field Subject,Language, Text,HTML etc and saved it. *But again i did not see any change at presentation level of MySpace.page1.* *It would be great if somebody can explain with small example what i can achieve with edit the class and editing the object.* *For Example :-Like what i can expect after edition in my scenarios.* *I think its a vey useful feature but somehow it is not documented in detail at that link or may be i am not able to understand. Looking for your expert somments.* ** ** Thanks