[xwiki-devs] XWiki Classes and Properties

Hello all, I went through the TodoClass tutorial and found it useful. I have a question regarding this functionality. Are these classes or the values of the properties for its instances saved in any table in the Xwiki database? Say, we use Classes and Objects to create a form that the user needs to create a document. Will the form values be saved in a database? How can we access the values of any instance of the created class? Also, how do we Delete a property from a Class definition? (If added by mistake while creating the class) Thanks for all help