Adding a description to auto-generated Purchase Order

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We have Oracle setup to automatically generate the PO from the Requisition. We would like the Description or line type to populate on the notice sent to the PO requester after the PO has been created. Right now the email provides the Requistion and PO numbers, dates Supplier ID, but no information as to what the PO is for. If they open the attachments, the information is there, but the users want to be able to see this information without opening the attachments. Would anyone have any suggestion for how we might accomplish this.

Thank You