48951 2010-11-03 14:04:46 -0700 MathML needs to work with vertical text. 2019-07-02 08:15:24 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) PC OS X 10.5 NEW https://bugzilla.mozilla.org/show_bug.cgi?id=1077525 https://github.com/mathml-refresh/mathml/issues/18 P2 Normal --- 46123 195797 1 hyatt hyatt alex donggwan.kim fred.wang kojii sausset oldest_to_newest 304275 0 hyatt 2010-11-03 14:04:46 -0700 MathML needs to work with vertical text. 391864 1 alex 2011-04-25 13:42:19 -0700 What exactly does this mean? Is it a left-to-right block containing mathematics in a vertical line? I've asked some Japanese epub experts about this exact issue and was told they use left-to-right for mathematical texts. I'd love to see a sample (scan of a page) of vertical writing with modern mathematical text embedded. 525302 2 kojii 2011-12-21 09:58:54 -0800 Basically, you should rotate clockwise by 90 degrees for vertical-* values. Please take a look at spec: http://dev.w3.org/csswg/css3-writing-modes/#writing-mode saying: However replaced content involving text (such as MathML content or form elements) should match the replaced element's writing mode and line orientation if the UA supports such a vertical writing mode for the replaced content. I have some scan samples collected at: http://wiki.csswg.org/spec/utr50#math Hope this helps.