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   Re: Do I need to use a validating parser?

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  • From: "Rick Jelliffe" <ricko@allette.com.au>
  • To: "XML Developers' List" <xml-dev@ic.ac.uk>
  • Date: Fri, 7 May 1999 01:13:09 +1000

From: Joshua E. Smith <jesmith@kaon.com>

 >My language isn't anything like LISP or ALGOL, but I think this gets
>point across.  It's pretty easy to write programming languages which

>From one point of view, all interaction actions with a computer
corresponds to "programming" in a language (in that a grammar, however
complicated, can be constructed to model it: I suppose this is an
implication of Church's Thesis).  While true, that viewpoint deprives
"programming" of its specific meaning; it makes "programming
language"=="markup language"=="interaction modeling language".  It
ignores that a markup language is designed to be data with processing
instructions embedded, while a programming language is processing
instuctions with data embedded.

Of course, there are middle grounds: there are data-ish programming
languages such as LISP, and programmish DTDs such as ISMID.

If you are looking at making programming languages in XML, look at
ISMID, which is a compiled format for IETMS (Interactive Electronic
Technical Manuals).
You can see it at the US Navy site (www.ietm.net) or (better) at the ISO
then go "documents" then search for "MID" (remember to click the "Search
by title" button") then clock on document 7, "Revised Text of MID".

Rick Jelliffe

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