What are linked inputs?

Why is this item needed in actions? How can this be used? What is the use?

This used to be internal use only, but has leaked to public version.

On that edit box you can set comma separated target id numbers and action will take place to all those inputs at the same time.

86,204,37,125 right?

Is that allowed?
86.204, MAINVAL, 38

MAINVAL - <value name “MAINVAL”>

No, only comma separated target id numbers are allowed. Naturally, if you wan’t to link to only one input you can leave this empty.