The DataObject only works on Web Servers running PHP5. It's a DataAccessObject that allows the access and manipulation of data within Objects.
For working examples on usages of the DataObject check out by_example_php5
This is a reference documentation on the different features of the DataObject
The data object is a big class that do more than just data access. It extend the sqlQuery object and add to it all the view and form feature of Radria.