Relation between subscription and a product that indicates the subscription is
subscribed to this product in some way.
ID to identify the ordered product with
The amount of time in units between shipments of this order
The time measure for interval units
If added as part of a plan, this will be the reference.
The associated product record for this order line
The ID of the associated product record
The amount ordered for this product
The next date on which a new order should get initiated
The total amount that the customer has ordered of this product upto now