Redefining the markup language on the fly?

Bert Bos (
Fri, 10 Jun 1994 16:20:06 +0200 (METDST)

Message-Id: <>
From: Bert Bos <>
Subject: Redefining the markup language on the fly?
To: (* WWW/HTML discussion list )
Date: Fri, 10 Jun 1994 16:20:06 +0200 (METDST)

I think the meaning of RENDER needs some clarification:

 |> >
 |> >And now use <NEW_TAG> all over the place.  What happens when I want to
 |However, it will make it impossible to completely 
 |regularize the language as an SGML DTD.  That is,
 |it would be impossible to parse a document that 
 |added new tags in this manner.  

`Render' is not used to introduce new tags, rather it is used to
define styles for elements already introduced in the document subset
(see my earlier post `Re: meta information (-->in body)' of 2 Jun

Therefore, there is no sense in using `render' without at least one of
`equiv' or `style' defined.

The HTML+ DTD shows an example (though without much explanation), see


PS. the message I referred to is archived in Nick Arnett's www-html
archive as , but the layout
has suffered a bit...

PPS. There is a small error in that message, can you find it?
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