Consider adding query that retrieves information to 'Mappings by dataset ID' (Data Model)

[MariekeMassa]

Resulted from discussion during connectathon with Edwin (Topicus).
He wanted to know how the wettelijk vertegenwoordiger could be retrieved, but more in general, he was looking for instructions how specific data items can be retrieved (which queries can be used to do so). We should consider if we want to add a query specifically for the wettelijk vertegenwoordiger contact person, and if we want to add a column to the mapping containing the queries.

[MariekeMassa]

We will elaborate the client requests section on the data exchange page.