- see here Wikipedia_talk:WikiProject_Mathematics#about_Coxeter–Dynkin_diagram, and here Wikidata:Project_chat#datatype_for_en:Coxeter–Dynkin_diagram?.
- Examples:
- 2 21 polytope (Q4633288) →
→ x3o3o3o3o *c3o - cube (Q812880) →
→ x-4-o-3-o - Hessian polyhedron (Q27998992) →
→ x₃-3-o₃-3-o₃ - pentagram (Q182186) →
→ x-5/2-o
