W3C home > Mailing lists > Public > www-html@w3.org > January 2003

Re: My thoughts on XHTML 2

From: Mjumbe Ukweli <mpoe@cs.hmc.edu>
Date: Wed, 22 Jan 2003 12:36:49 -0800 (PST)
Cc: www-html@w3.org
Message-ID: <Pine.GSO.4.44.0301221229360.20969-100000@turing>

On Tue, 21 Jan 2003, fantasai wrote:
> Kelvin Chung wrote:
> > 1. Is there any point to having <sub> or <sup>?  I cannot find any real
> > semantic value in these two elements.
>   "The mass of the large block is <var>m<sub>1</sub></var>..."
>   9ft<sup>2</sup>
>   C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>

None of the above examples really answers Kelvin's question (with the
exception perhaps of the first one).  If an engine were given the task of
finding the units on the 9 above, how would it make heads or tails of:
ft<sup>2</sup>?  This is just feet with a superscripted 2 at the end.  It
might do better for there to be entities like &squared; and &cubed; that
really mean something.

In the same vein, how would an engine know how many Hydrogens are in the
above equation for glucose?  Nothing about "<sub>" makes this clear.  In
these two cases <sub> and <sup> are used presentationally where something
more semantic may be in order.

- Mjumbe[wu]
Received on Wednesday, 22 January 2003 15:41:19 UTC

This archive was generated by hypermail 2.4.0 : Thursday, 30 April 2020 16:20:48 UTC