Hi Agnieszka, Hi Daniel
I'm assuming that Daniel is right - we can't map collection items into single fields - Webcon expects item list.
There shouldn't be a need to store the body inside of a multi-line field though - it should be accessible through business rule on mapping page as 'Input value' parameter.
I'm parsing XML from REST-like API which returns XML instead of JSON. In attachment example mapping, and business rule used to get the XML content.
With JSON though it might be more tricky as OPENJSON requires database Compatibility Level at 130, and by default Webcon database are at 120 according to this*
You should be able to check it with this SQL:
SELECT compatibility_level
FROM sys.databases WHERE name = 'BPS_Content';
However i'm thinking right now, that you might be able to create an empty database with high compatibility level, create a new connection, and use that connection to query with OPENJSON available.
*https://community.webcon.com/posts/post/compatibility-level-of-webcon-bps-databases-good-practices/323/3