Unable to map 2 different collections

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1

Hi folks,
I hope you can help me on the following topic:

Through a connector from another integration server I’m able to get an XMLString.
I have treated this string with stringToDocument and documentToRecord
so I got a record with two collections (2 recordlists inside).
I want to map one of this recordlist in another…
The map operation like

DOCUMENT DOCUMENT
|_RECORD_A |_RECORD_B
|_c0 -------------------> |_d0
|_c1 -------------------> |_d1
|_c2
|_c3

Unfortunately or owing my short experience I’ got
only the first record but I’m not able to be
successful with the map.

Any help will be appreciated?

2

I’ll add more information for the sake of details
the MAP is like
DOCUMENTa…<>…DOCUMENTb
|_RECORD_A1…|
|_RECORD_A2…|
…|_RECORDS_A…<>…|_RECORDS_B (THIS RECORDS ARE COLLECTIONS)
|_c0 -------------------> |_d0
|_c1 -------------------> |_d1
|_c2
|_c3