In the Place Marker trait description in the VASSAL Reference Manual, I noticed the following description on how to link a placed marker to its parent piece as follows: {UniqueID==“$ParentID$”}. I tried using that in the “Set Piece Property” trait “Additional Matching Expressions”, and it doesn’t seem to work. However, when I changed it to {ParentID == “$UniqueID$”} (reversed the properties), it does work.
If I understand how it’s supposed to work, ParentID is in the subordinate piece, and the UniqueID of the parent is being referred to. So the correct nomenclature is {ParentID == “$UniqueID$”} and should be updated in the Reference Manual?