Chapters without chapter number

["Pavel Hanák" <pavel@hanak.name>]

Hi all,

I would like to ask what is the best way to achieve this:

The title line of the chapter should be without the chapter number,
but the chapter number should be on all subsequent pages in the header.

I tried this:

\setuphead
  [chapter]
  [header=empty,
   number=no
  ]

\setupheadertexts[{\getmarking[chapternumber]. \getmarking[chapter]}]
  
which makes the title of the chapter on the first page correctly without
the chapter number, but then I have no chapter number on subsequent
pages in the header. It looks like setting "number=no" in
\setuphead definition breaks my expected behaviour of marking.

So I tried:

\setuphead
  [chapter]
  [header=empty,
   sectionnumber=no
  ]

but id didn't work either.

So I ended by:

\def\MyChapterTitle#1#2{#2}%

\setuphead
  [chapter]
  [header=empty,
   command=\MyChapterTitle,
  ]

\setupheadertexts[{\getmarking[chapternumber]. \getmarking[chapter]}]

which is working like expected, but I wonder, why I am not able to
achieve the result using keywords "number" or "sectionnumber".

Thanks.

Pavel

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