Queue Unit 

Definition

If several data elements belong to the same processing unit, this unit is known as a transaction-oriented data unit or Queue unit.

Each relevant data element must retain a specific sequence ID:

Q_SINGLE (S)

Individual element

Q_FIRST (F)

First element

Q_MIDDLE ()

Not first/last element

Q_LAST (L)

Last element

A processing program, which is active at a later time, can only delete the data in a queue unit, if the last data object has been acknowledged as processed.