Hello,
Perhaps the key proposed by Wolfgang is what I want to do : put a dash
between the numbering and the text

\setupenumerations[
       before={\blank},
       after={\blank},
       text=Théorème ,
       alternative=serried,
       headstyle={\sc},
       prefix=yes,
       prefixsegments=chapter,
       way=bysection,
       *numberstopper={. ---},*
       style=italic,

]

\defineenumeration[theorem]

Fabrice


2018-07-25 12:15 GMT+02:00 Fabrice Couvreur <fabrice1.couvreur@gmail.com>:

> Hello,
> I used LaTeX for a long time before converting (with difficulty !) to
> ConteXt. For example, to define my new theorems, I used the amsthm
> package and I did this :
>
> \newtheoremstyle{theoremdd}% name of the style to be used
>   {\topsep}% measure of space to leave above the theorem. E.g.: 3pt
>   {\topsep}% measure of space to leave below the theorem. E.g.: 3pt
>   {\itshape}% name of font to use in the body of the theorem
>   {0pt}% measure of space to indent
>   {\bfseries}% name of head font
>  * {. ---}% punctuation between head and body*
>   { }% space after theorem head; " " = normal interword space
>   {\thmname{#1}\thmnumber{ #2}\thmnote{ (#3)}}
>
> \theoremstyle{theoremdd}
> \newtheorem{thmd}{Theorem}[section]
>
>
>
> I'm trying to do the same thing with ConTeXt but I can not do it
> completely :
>
> \setupenumerations[
>        before={\blank},
>        after={\blank},
>        text=Théorème,
>        alternative=serried,
>        title=no,
>        prefix=yes,
>        prefixsegments=chapter,
>        way=bysection,
>        right=.,
>        titlestyle=bold,
>        style=italic,
>        width=broad,
>
> ]
>
> \defineenumeration[theorem]
>
>
> \starttext
>
> \startchapter[title={First Chapter}]
> \startsection[title={First Section}]
>   \dorecurse{2}{
>     \starttheorem
>       \input ward
>     \stoptheorem}
> \stopsection
> \stopchapter
>
> \startchapter[title={Second Chapter}]
> \startsection[title={Second Section}]
> \dorecurse{2}{
>     \starttheorem
>       \input ward
>     \stoptheorem}
> \stopsection
> \stopchapter
>
> \stoptext
>
> Thanks
> Fabrice
>