mathjax
Implement columnspan for MathML’s mtd element
I see there has been some discussion, but no progress on this matter. A customer of ours intends to use MathJax for presentational MathML rendering. There are some aligned expressions in their content, currently expressed using mtd/@columnspan, since this works in Firefox’s native MathML implementation at least. <maligngroup/> does not seem to be supported by both implementations. I’m aware of #1104. Is there any chance that either alignment markers or column/row spanning attributes will be supported any time soon? Will it accelerate development if the customer provides some funding?
Column and row span have been on the hoped-for improvements list for some time. There are some technical difficulties in handling all the cases using CSS tables, but it should be able to cover most of the important situations.
We are in the process of a total rewrite for MathJax v3 (first public beta released two weeks ago). It would be possible to add column- and row-span support there. Yes, I believe that support from a client could be used to push this development forward. I will check into that. Send me an email through the link in my profile and we can discuss it further.
