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Re: mathcolor/mathbackground on <math/> and <semantics/> elements?

From: Bruce Miller <bruce.miller@nist.gov>
Date: Wed, 21 Apr 2010 22:43:04 -0400
Message-id: <4BCFB7B8.1000000@nist.gov>
To: www-math@w3.org
[Prefix all w/ IMHO ..
   the group will discuss this...]


On 04/21/2010 09:23 PM, Karl Tomlinson wrote:
 > ...

I believe the issue stems from there being two ways
to think of mathbackground (& mathcolor) being
allowed on mstyle.

(1) is that mstyle is a presentation element, and
so it accepts the mathbackground attribute. The
effect is described in 3.1.10, namely it fills the
bounding box of the element (and it's children).

But
(2) is that the mathbackground attribute is accepted
on mstyle since the mathbackground attribute is
accepted on _other_ presentation elements (see 3.3.4.1).
In such cases, the effect is to change the default
mathbackground.

Those effects are subtly different, as you noticed.
.. and in fact, I think (2), is kinda screwy
[mathcolor seems to bypass the screwiness
by having it's default be inherited, anyway].

I would argue that (1) ought to take precedence
since it's just so much more direct.
But seriously, you raise a good point that
we should be clearer about that
(assuming we all agree).

And for the math element, I think it should
get all the attributes of mstyle... and also
the reasons mstyle gets them!
In other words, I think it would be more
natural and useful for math@mathbackground
to set the background for the contents, not the
default.
Received on Thursday, 22 April 2010 02:44:01 GMT

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