>Hi
>
>I have a collection of data-objects in my app, I want to use these data-objects to hold certain values to keep things in the app up to date. Is this a good idea?
>
>For example, I have a USER data-object, that can add/edit/delete records, but also contains functions that can be called by it's parent, and may also validate usernames/passwords and also hold the currently logged in userid, userlevel etc.etc.

Generally speaking, it sounds to me like you are describing an ordinary business object. (It would talk to a data object that does the actual data-related stuff like add, delete, save records, say).

So, yeah. In my mind a user business object would have this functionality.