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From: Berend de Boer <berend@pobox.com>
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Subject: Re: New \setup...
Date: Mon, 28 Aug 2000 21:13:53 +0200
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Michal Kvasnicka wrote:
> 
> Hallo!
> 
> I'm updating my package for direct typesetting SGML with TeX. I'd like
> to customize it in time to be ConTeXt-like. How those \setup...'s are
> working?
> How can I write my own? Is there some tool (macro) for that? I'd like
> something
> like this:
>     \definesgmltag [tag name] [based on]
>         [grouped = yes|no,
>         beforegroup = command,
>         aftergroup = command,
>         before = command,
>         after = command,
>         swallowed =command]
> where "based on" is voluntary. And similar to that:
>     \setupsgmltag[tag name] [see #3 in \definesgmltag]
> 
>     \definesgmlspecialtag [tag name] [based on] [command = command]

This is:

\def\definesgmltag%
	[\dotripleempty\dodefinesgmltag]

\def\dodefinesgmltag[#1][#2][#3]%
	{...}

Keys can be processed with \processallactionsinset (or
\processfirstactioninset and such). Look in the source for examples:

	\processallactionsinset
		[#2]
		[baseon=> \somemacro,
		 notbasedon=> \someothermacro,
		 \s!unknown=>\elsemacro]

Important source files are syst-ext.tex, syst-gen.tex

> Is there some documentation for this?

Not really, but the source is clear, but perhaps you need to know dutch
:-)

Groetjes,

Berend. (-: