works indeed with tables 7505 and 7501.
create a query.
dataitem = "Item Attribute Value Mapping", filter by TableID=27
column "No."
dataitem "Item Attribute Value", Indent 1, dataitemlink: Attribute ID=Item_Attribute_Value_Mapping."Item Attribute ID",ID=Item_Attribute_Value_Mapping."Item Attribute Value ID"
column = Attribute Name
column = Value