спасибо за подсказку
почему захотел использовать мап в качестве датасорса:
http://msdn.microsoft.com/en-US/libr...(v=ax.50).aspx
Tables, maps, and views are the objects through which data is stored and accessed in Microsoft Dynamics AX. Any of these objects can be used as a data source for a query. Tables, maps, and views have corresponding objects in the SQL Server or Oracle database and are continually synchronized with the database.
но сейчас все прояснилось