Alternate target inter-project deliver operation

In stream DA, activity a1 is incorporated into baseline DA.BL2. Project PB is created with baseline PA.BL2 from project PA as its foundation baseline. Project PB makes a new baseline PB.BL1, which is the foundation baseline for child stream DB. A delivery starts at baseline DA.BL2 in stream DA in project PA and ends at stream DB in project PB. Stream DB makes a new baseline DB.BL1 which incorporates the changes in activity a1.