I am trying to create custom adapter using IWarehouseAdapter, it requires custom fact table that reference to exiting "Team Project" and "Work Item" Dimension table as DimUse object. When inserting new fact entry, system has to define key field value for each DimUse field. For "Team Project" the key value is projectUri, what is the key value that should be inserted for the "Work Item" Dimension The warehouseschema.xml gives some information but it is not very helpful. Is there any other document I can reference to