I would like to have the following typesetting in my ConTeXt document, but I don't master its conversion mechanism to yield it.
First part, Second part, Third part...
Chapter 1, Chapter 2, Chapter 3...
Section 1.I, Section 1.II, Section 1.III...
Subsection 1.I.a, Subsection 1.I.b, Subsection 1.I.b...
Subsubsection 1.I.a.i, Subsubsection 1.I.a.ii, Subsection 1.I.a.iii...
Thanks for helping me.