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Principle of Least Power (was Re: Agenda of 7 February 2006 TAG teleconference)

From: Henry S. Thompson <ht@inf.ed.ac.uk>
Date: Tue, 07 Feb 2006 19:32:04 +0000
To: noah_mendelsohn@us.ibm.com
Cc: Vincent.Quint@inrialpes.fr, www-tag@w3.org
Message-ID: <f5b3biv2cej.fsf@erasmus.inf.ed.ac.uk>

Hash: SHA1

I realise I'm not altogether happy about the degree of vagueness of
the appeal to 'power' in the current draft.

In particular, I think we need to distinguish between expressiveness
on the one hand and formal complexity on the other, whether worst-case
time/space complexity or formal-language-theory complexity.

Expressive richness is not necessarily 'bad' complexity -- consider
boolean logic expressed with 0, 1 and Shaeffer stroke (== exclusive
or) versus boolean logic expressed with and, or, implication and
negation -- the latter is both more complex and _much_ easier to work
with, but at _no_ additional cost.

I think I'd be much happier if this were made clearer.

- -- 
 Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
                     Half-time member of W3C Team
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            Fax: (44) 131 650-4587, e-mail: ht@inf.ed.ac.uk
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Received on Tuesday, 7 February 2006 19:32:25 UTC

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