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XFO Mapping...

Subject: XFO Mapping...
From: Guy_Murphy@xxxxxxxxxx
Date: Tue, 4 May 1999 09:47:55 +0100
xfo
Hi.

Thought I'd float this on this list to see what people think.

On the issue of accesibility, and just as importantly addressing other
media presentation in light of its own merit, I as I've agued previously
prefer the idea of keeping seperate presentation objects withing their own
domain, largely due to considerations of design clarity, factoring, utility
and extensibility.

For this reason I would prefer to see for instance Aural Presentation
Objects (APOs) designed as objects in their own right, that can be used
along side or in their own stylesheet to address aural presentations.

The idea was however raised of mapping XFOs to an accesibility standard,
and I thought might this not be useful in general for XFOs to be able to
do...

<xsl:block map="apo:speech">
     ...
</xsl:block>

...in this way support for other output could be given without getting into
overly verbose stylesheets, while those who want to incorporate other
presentation objects as part of design (where arual and written
presentation may vary to address different needs) could still be catered
for.

You see, I believe that designers should address arual presentation as a
design in and of itself (I intend to), simply degrading I believe to be the
lazy option, and doesn't truly address the needs of the audience. Aural
presentation is not likely to be the sme as the written. Allowing mapping
addresses this laziness while not affecting those who want versatility of
design.

It might also be possible to produce a schema for default mapping in XSL,
rather than just inline mapping....

<xsl:map object="xsl:block" to="apo:speech">
     ....
</xsl:map>

...or...

<xsl:map object="xsl:block" to="html:div">
     ...
</xsl:map>

These ideas are not carefuly considered, and I'm sure better more flexible
semantics could be produced, and the issue does get thorny when one
considers mapping attributes, I just thought I'd introduce the idea for
discussion.

Cheers
     Guy.



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