I have a question in regards to model.Load(). In all the examples I have seen there is always a callback function or success function that passes a parameter my question is this parameter is never defined in the examples I have seen. Can someone clarify this? In this callback function for example the parameter book is neverdefined. Is it the root of the returned data? I have been trying to model my app according to these examples in architect2 but everytime the data is loaded the parameter is undefined as shown in firebug.