A collection of class retrievers is created in order to perform the retrieve per class.
A scan is performed on the retrieved xml to identify the classes to be worked on (using the ‘Identifying Interface’ as defined under Retrieving. Once the class to be retrieved is chosen (by looping through the class retrievers), a scan is performed over all mapped properties to see changes.
If a property has not changed – this property will not be in the list of properties to be updated, otherwise it will be added to the task properties to be updated and entered into the To Do List.