# reservation/SubscriptionId #level100 #cur #finops #curfield #curtoanonymise ## Source - Category: [[Reservation details]] - [AWS documentation](https://docs.aws.amazon.com/cur/latest/userguide/reservation-columns.html#r-S) - [[lineItem_LineItemType]]: Fee, RIFee, DiscountedUsage, Refund, Credit, and Usage ## Relevant notes - This line only applies to [[Reserved Instances]] ## Notes - This could be connected with a pricing offering, mapping the line with the billing price. In this case it could be useful when special discounts are applied, like [[PPA]]. [[to check]] - A unique identifier that maps a line item with the associated offer. It is unclear what an offer is! - The documentation recommends to use [[reservation_ReservationARN]] instead of this field but says that both can be used. - There can be a subscription id even without a reservation. In this case the [[reservation_ReservationARN]] is empty.