I would like to ask if there is anyone that could shed some light onto ATOM_TYPING_RULES section in MS force field .off file?
Here is an example from the Universal.off file:

ATOM_TYPING_RULES
H_              H            0           0           0           1
H___b           H            0           0           2           1
                **           0           0           0           1
C_R             C            2           0           1           1
                **           2           0           2           1
                **           2           0           0           1
                **           2           0           0           1

I'm particularly interested what actually these columns mean? The first and the second one are intuitive but the rest is not that clear.

Also, what is a difference between ATOM_TYPING_RULES and GATE_TYPING_RULES?
I tried the following within GATE_TYPING_RULES and used forcite to assign ff but it doesn't work.

GATE_TYPING_RULES
 type: N1
   !nitrogen in H2N-C
   template: (>N(-H)(-H)(-C))
 end_type

 type: N2
   !nitrogen connected to 2 carbon atoms
   template: (>N(-H)(-C)(-C))
 end_type

 type: N3
   !nitrogen connected to 3 carbon atoms
   template: (>N(-C)(-C)(-C))
 end_type

Even though I already wrote a script that would assign ff types to my system of interest, I would still like to be able to automatically assign them "on the fly" once I start some Forcite job.

Thank you for your time and I'm wishing you a nice day.

Best regards,

Bojan