How to make condition for 'o' key markings?

I am trying to make rules for some of my vstis and having good success so far. But I am stuck on one thing: how to include conditions for the markings that can be created by the 'o' key. To wit:
natural harmonic / open (circle over note)
cut circle (slashed open circle over note)
bartok pizzicotto (open circle with offset line over note)
I also couldn't figure out the "closed" (plus sign) articulation.
If anyone here can clue me in I would be most grateful.
natural harmonic / open (circle over note)
cut circle (slashed open circle over note)
bartok pizzicotto (open circle with offset line over note)
I also couldn't figure out the "closed" (plus sign) articulation.
If anyone here can clue me in I would be most grateful.