Generates and Exports entity (product, customer, supplier) wise periodical summary report for Northwind food distribution company as XML file.
The generated output will be of the format
<year_end_summary>
<year>
<start_date>XXX</start_date>
<end_date>XXX</end_date>
</year>
<entity_list>
<entity_name>XXX</entity_name>
<other_entity_information>XXX</other_entity_information>
</entity_list>
</year_end_summary>
Refer developer Wiki for more explanation.