Update modes

Hello Guys,

I have a doubt like

In LO extraction we have different applications ,for example in Sales(SD) we have diffrent DataSources like(2lis_11_vahdr,2lis_11_vaitm,2lis_11_vaitm)

my doubt is for every seperate DataSource in the same application can we set different update mode or for every Application there will be only one update mode?

I have not worked on BussinessContent extractors, i am little confused.

Thanks