Insert multiple field value from command line

Explain the problem as you see it

The commnad line is a very efficient tool to add values into field, the problem is that it is not possible to had multiple values (e.g. projects linked to a todo, attendees in a meeting, ...)

Why is this a problem for you?

Often I have fields htat needs multiple values and I need to interrupt the command line flow to open the node and add manually the second or third values

Suggest a solution

Add the possibility from command line to add multilple values. one idea could be to have one command SET that always add the value, one command REPLACE and one command EMPTY/CLEAN.