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Re: mstack and south carries

From: David Carlisle <davidc@nag.co.uk>
Date: Mon, 16 Mar 2015 16:12:36 +0000
Message-ID: <550700F4.2060207@nag.co.uk>
To: <www-math@w3.org>
On 16/03/2015 16:02, Daniel Marques wrote:
> Hi all,
>
> The MathML specification allows specifying carries at south positions.
> In this case, when other rows of carries exists it is not clear how the
> formula must be rendered.
>
> For example, in the following formula
>
> <mstack><mscarries><mn>1</mn></mscarries><mscarries
> location="s"><mn>2</mn></mscarries><mn>3</mn><msline/><msrow/></mstack>
>
> What’s is the expected rendering?
>
> 1
>
> 3
>
> 2
>
> Or maybe
>
> 1
>
> 3
>
> 2
>
> ?
>
> Dani
>

personal response but the spec says

 > the first row of carries annotates the second (following) row as if
the second row had location="n".

so the position of the 1 isn't affected by the fact that the 2 has
location=s, it is positioned as if the 2 had location=n so just above
where that would have been.

But it goes on to say

 > This means that the second row, even if it does not draw, visually
uses some (undefined by this specification) amount of space when displayed.

so the exact amount of space below the 1 is implementation defined.

David


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Received on Monday, 16 March 2015 16:13:14 UTC

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