OK, I figured it out... (Please let me know though if it's not the best way

)
I did this in code:
InventoryService inventoryService = new InventoryService();
TList inventory = inventoryService.GetAll();
DataSet ds = inventory.ToDataSet(false);
ds.WriteXmlSchema("c:\\inventory.xsd");
(Is there an easier way to produce the xsd?)
Then I copied the xsd to my App_Code directory and I can now design my report.
Thanks, Tony