java stack and ABAP stack in upgrading SP

Hi,

pls pardon if it appears silly question. I dont have much knowledge in Basis

I am on XI3.0 with SP 09 and upgrading SP to SP20 from SAP service market place.

How can I identify which is java stack and which is ABAP stack in evrery SP because Java stack can be directly upgraded to SP20 but ABAP stack has to be upgraded one by one (like sp 01..10..11..finally sp20).

Could you pls let me know, from the list of files how can I identify which is ABAP stack and which is java stack ? so that I can first update the ABAP Stack one by one and then move to javastack

thanks,

Dushanth