If you want to create business elements without having to consider how the execution elements will be implemented, you can create an empty BOM entry that you then map to the XOM.
You can create business elements without considering how the execution elements will be implemented. In this case, you create an empty BOM entry that you later map to the Execution Object Model (XOM). You can also extend the BOM without modifying the original XOM.
To create an empty BOM entry:
You can now add business elements to this BOM entry. Later, you can map them to an execution object model (XOM).