I haven't any sample file for POA with multiple transaction set. As i am exploring about POA where file must contains Multiple PO and each PO contains multiple PoLines along with Ack.
Lets say i have 2 PO and each po have 2 PoLines along with Acknowledgment. I have created the POA file as what my understanding after reading the EDI tutorials, but confused whether file structure is correct or not.
ISA*00* *00* *ZZ*1697978 *01*1234567 *060110*0937*U*00401*000000834*0*P*>?
GS*PR*1697978*1234567*060110*0937*24*X*003060?
ST*855*000000001? // For PO-1
BAK*00*AE*200601100645*060110?
N1*ST**15*1234567?
PO1*48899*1*EA*14.95*SR*IB*0060654570*B6*MANNING BRENNAN?
PID*F****Reflections for Ragamuffi?
ACK*AC*1*EA****IB*0060654570*ZZ*00?
N1*ST**15*1234567?
PO1*48899*2*EA*14.95*SR*IB*0060654571*B6*MANNING BRENNAN?
PID*F****Reflections for Ragamuffi?
ACK*AC*2*EA****IB*0060654571*ZZ*00?
CTT*2*3?
SE*12*000000001?
ST*855*000000002? // for PO-2
BAK*00*AE*200601100646*060110?
N1*ST**15*1234567?
PO1*48900*2*EA*14.95*SR*IB*0060654575*B6*MANNING BRENNAM?
PID*F****Reflections for Ragamufi?
ACK*AC*2*EA****IB*0060654575*ZZ*00?
N1*ST**15*1234567?
PO1*48900*2*EA*14.95*SR*IB*0060654576*B6*MANNING BRENNAM?
PID*F****Reflections for Ragamufi?
ACK*AC*2*EA****IB*0060654576*ZZ*00?
CTT*2*4?
SE*12*000000002?
GE*1*24?
IEA*1*000000834?
should ST-SE be repeated for each PO Acknowledgment ?
Yes, the ST/SE segments are nested just like you have in the example. each encloses a single 855. the GS/GE segments are also nested correctly in your example.