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List:       xml-dev
Subject:    Re: [xml-dev] Many different syntaxes in XML - is that good language design?
From:       Marcus Reichardt <u123724 () gmail ! com>
Date:       2022-03-08 7:01:02
Message-ID: 78C5F775-AD89-41B9-81DC-717A9822716E () gmail ! com
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> Am 07.03.2022 um 16:52 schrieb Pete Cordell <pete++xmldev@codalogic.com>:
> 
> It does make me wonder why the CDATA section 'directive' wasn't just <!CDATA[...]>. \
> Even more curious, given all the SGML things that got dropped, is how it got \
> included in XML.  It creates just as many problems as it solves

That I do know ;)

In SGML, not only can you have INCLUDE, IGNORE, TEMP, and RCDATA as status keyword in \
addition to CDATA, but those keywords could be expanded from parameter entities, like \
this

<!ENTITY % if_include "IGNORE">
<![ %if_include [ ... blah blah ... ]]>

to conditionally include/exclude content. And moreover, you can use marked sections \
in the document prolog/in markup declarations, not just in content. Used a lot in DTD \
construction and modularization where you'd reference an external subset with \
specifying overwriting ("preempting") values in the internal subset, hence \
"parameter" entities.

Best,
Marcus Reichardt
sgml.io
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