Item
The items in a document are the specific elements that the document handles. This can be goods ordered from a supplier, or goods bought by a customer.
On items one could easily get the information on the following:
Case
From where the item originally started. For a Sales Order (COA), the case can be a Sales Quote Request (CRQ).
Source
Where the item is transported from. For a COA item where the case is a CRQ, the source can be a Sales Quote (CQU). The scenario is then that a CRQ has led to a CQU. The CQU has then led to a COA.
Destination
Where the item has been transported to. For a COA item the destination can be a Shipping Advice (CSA). The scenario is then that a CRQ has led to a CQU. The CQU has led to a COA and the COA has led to a CSA.