- From: Bruce Miller <bruce.miller@nist.gov>
- Date: Thu, 27 May 2010 09:56:11 -0400
- To: www-math@w3.org
Sorry for letting this drop; I've made changes to sections 2.2.1 and 3.3.4.1 to reflect this interpretation; namely that mathbackground sets the background, not the default, for math and mstyle. You can see the changes at http://monet.nag.co.uk/~dpc/draft-spec/Overview-d.html Thanks for your comments. bruce On 04/21/2010 11:31 PM, Karl Tomlinson wrote: > Taking Bruce's comments out of order, hopefully not too out of context. > > Bruce Miller writes: > >> 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. > > I agree. > > I guess what is not clear is how this should be specified. > >> 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. > > Perhaps only (1) should apply, but I think for that to be > the case it needs to be added to mstyle's exception list. > > (1) is actually new to MathML3. > MathML2 already had (2). > Both (1) and (2) can actually coexist, but we don't like that > behavior. > > Now that we have (1), we like that behavior better and so want > to deprecate (2). >
Received on Thursday, 27 May 2010 13:56:58 UTC