What if DDA retention Period is equal Zero ?

Situation :

DDA Retention period =  0

Purging Time = 02:00

Simulation :

Create message Day1 on 07:00 – Message SI_TO_SWIFT

Create message Day1 on 10:00 – Message DDAA_QValidate

Create message Day2 on 07:00 – Message SI_TO_SWIFT

Nb: if I create message @ Day2 on 01:00, message will be in DDAA_QValidate. So, one day is counted based on Purging Time.

If I set DDA Retention Period = 1, the system will behave like I set it 0 (Zero)