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   RE: Re: Why I Hate Palmtops (was: Re: SGML, XML and SML)

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  • From: Mark Birbeck <Mark.Birbeck@iedigital.net>
  • To: xml <xml-dev@ic.ac.uk>
  • Date: Fri, 26 Nov 1999 17:25:29 -0000

Michael Champion wrote:
> The way I see it, if the underlying source for web pages is 
> coded in some
> XML-like markup language, then stylesheets driving the WML output can
> present only those elements that convey the essence of the page ... no
> sidebars, supporting quotations, banner ads, etc.  You won't 
> see the HTML
> page broken up into cellphone-sized screens (which I agree is 
> pointless).

I sort of agree. I think that this is where XSL-FO will come in. XML
will first be transformed to device-independent layout, and then that
will be transformed to HTML/XHTML for the Web, WML for the mobile phone
(for now), PostScript for print, Director for CD-ROM publications, FDML
(Fridge Door Mark-up Language) for showing on the front of your fridge
and BOEML (Back Of Envelope Mark-up Language) for developing radical

That way, if your XML source data changes you only change one XSLT
transform - to the FO. And adding a new device only involves saying how
a particular FO declaration works for that device. (Note that means only
once *ever*, not once per XML document or once per project. You only
need to say how FO instructions are rendered on that device once - we
could all share the same XSLT file.)

This would make a WAP gateway into a simple XSL-FO to WML mapping
server, and the rest of us wouldn't have to learn WML.

It also raises an issue which I'm quite into at the moment, that of
chaining transformations.



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