Hi, Paul,

Here's a bit of my class hierarchy:

• Item (abstract, entity in mapping file, typeField="ItemType")
• CategorizedItem (abstract, inherits Item, subEntity in mapping file, typeValue=1)
• LineItem (inherits CategorizedItem, subEntity in mapping file, typeValue=2)
• StaffingItem (inherits CategorizedItem, subEntity in mapping file, typeValue=3)

When I try this code:

ObjectSpace os = Manager.Engine.GetObjectSet(typeof(CategorizedItem), "")

the mapper's SQL criteria, as viewed by SQL Profiler,  specifies 'ItemType = 1'

This doesn't return any values, even if I have LineItems and StaffingItems in the table, because their ItemType values are 2 and 3, respectively.

Am I missing something?  The Mapping File Options wiki entry says that if CategorizedItem is abstract, I don't need to supply a typeValue, but if I don't, the mapper doesn't initialize, saying a typeValue hasn't been specified for CategorizedItem.

Regards,

Brad