Repeat source element1 as many as of other source element2 of diff context

Hi,

I have a requirement where i need to generate target element based on below condition

E1EDL24

E1EDL15 (ATNAM='PHG_SALES_ITEM' ) then pass the value of ATWRT to target element

E1EDL15

E1EDL15

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this i have done

Now i want to change the logic to i.e., only to pass fields values as many as of EXIDV field value exists which is of different context E1EDL37.

example if there are 10 ATWRT(context E1EDL15) field values in source but EXIDV(Context E1EDL) has only two source fields values need to generate only two fields values of ATWRT to target.

Please suggest.

Regards

Pavan