How to map web form repeatable section of elements to service array of elements in data association

Summary

How to map web form repeatable section of elements to service array of elements in data association

Content

Hi Guys,

 

How to map web form repeatable section of elements to service array of elements in data association.

 

Scenario:

I need to process invoices(it contains header and multiple lines), for the lines section to repeat/extend I am using repeatable section and enabled add/remove.

I can able to extend the lines section in form.

Coming to data association(mapping area), I am unable to map element to element with out specifying array.Because, we don't know the user can extend how many times.for this how can I map in data association.