RE: [xsl] Normalize / Simplify HTML-Tables with row-span / col-span

Subject: RE: [xsl] Normalize / Simplify HTML-Tables with row-span / col-span
From: David Tolpin <dvd@xxxxxxxxxxxxxx>
Date: Tue, 17 Feb 2004 21:24:07 +0400 (AMT)
> > Do you see any advantage in turning simple and obvious 
> > operation at the level of XSLT ( (exsl|xt):node-set ) into 
> > something optimization-based?
> > 
> I'm sorry, I don't understand the assumptions behind this line of
> reasoning. To my mind, the RTF in 1.0 was a ghastly mess, with it's
> rules that say "you can use it anywhere that a string can be used, it
> then behaves like a document node converted to a string, but you can't
> use it anywhere you can use a document node". Enforcing these
> restrictions was a nightmare and led to really buggy and inefficient
> code which I was very happy to throw away. Where exactly do you see the
> merits of RTFs?

I must think about it, I don't know how to explain my doubts.

In SAXON 6, I had to switch between tiny tree and normal tree models
to get performance close to XT for various stylesheets (which was
still almost twice faster -- in one particular but rather important

My impression is that restrictions imposed by RTF could be used to
implement RTF generation more efficiently than node-sets.

Since many stylesheets just generate result tree in one pass and
do not convert them into node-sets (in XSLT 1.0), a good implementation
could implement RTF in a much more efficent way than node-set.

David Tolpin

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