Label door in a linked file with multiple instance

[linkboy]

Room-R22.rvt is the linked file; Plan-R22 is the host file. I have two instances in the host. How can I label the doors with room numbers, like 101-1 and 102-1? In door schedule, combine linked file name with door mark, works just fine. But cannot "combine" two parameters in the door label. 

[RDAOU]

@linkboy  Unfortunately the tag does not have access to parameters outside its host. IE: The room number would need to be entered into a parameter of the doors.

[Basam.Yousif]

Maybe use the "Load as Group" command?

Ideally, the rooms will work better as groups rather than links - but this method sort-of combines the two.

You can also include both doors in the linked room model and control their visibility per each link instance via worksets, design options, or filters.