I've seen there are many types of vertices using in Coxeter-Dynkin type diagram to describe the symmetries and polytopes.
https://en.wikipedia.org/wiki/List_of_planar_symmetry_groups#Wallpaper_groups
https://en.wikipedia.org/wiki/Schl%C3%A4fli_symbol
What I've seen in above linkes are Normal nodes, ringed nodes, hole, ringed hole, dash in hole, pause button, plus in hole, dot in hole, etc.
I understand how the ordinary Coxeter-Dynkin diagram works, but I couldn't reproduce the result when there are other types of vertices.
For example, (0)-3-(0) produces the star hexagon, but I don't know how ringed hole works, and so I couldn't understand why it happens. I guess that (')-3-(') produces the star hexagon, but this just generates the truncated triangle = hexagon.
So, I would like to know the action of such vertices and requests the dictionary or visual guidance to understand such things. Are ther any recommendation?