Joining multiple entities by one attribute?

Hi All,  I am doing an XML import, and in doing so I am creating 10 entities from the XML objects. I would like to join these entities into 1 master table, and join them on one common attribute, say "SubmissionID". Can anyone lend a hand and advise the best way to do this? Is there a way I can do this in the XML import (calling a webservice) or is it best to do so after it's imported into those 10 entities?   Thanks!
1 answers

Simply pass the top entity to the next object with a microflow which delivers the same object.

For every List you need a new non persistent object.