I can't see the problem, as the default numbering scheme is the same as
the book style. (see attached file)

If you want to customize, you can re-define the macros (example for
section tag, you can do the same for the others tags) :
section-nr is the counter for sections
<the-section> is a macro which displays the section header.
<display-section> is a macro used to compute the full header

You can even modify the macros in the middle of a doc (but, who wants to
do that ? Example in parts.tm)

HTH

MT

Le jeudi 26 novembre 2015 à 14:10 +0100, marc lalaude-labayle a écrit :
> Hi,
>
>
> one asks me to write in a book style with the chapters numbered,
> section too but in this way :
>
>
> Part I
> Chapter 1
> 1 Section 1
> 1.1 Subsection 1
>
>
> and not
>
>
> Part I
> Chapter 1
> 1.1 Section 1
> 1.1.1 Subsection
>
>
>
>
> Does anyone know how i can make this ?
>
>
> Thanks in advance.
>
>
> Marc