Hello Neil,
Neil Soiffer schrieb am 15.08.2025 um 07:07:
Regina,
Deyan forwarded your letter to the W3C Math WG. His mail was prompted by
some problems I saw. I am using the latest release for Windows 10: 25.2.5.2.
If you export to EPUB (via either Export or Export As...), there is no
math at all in the resulting document: no image file, no MathML, nothing.
I have created bug 168015 for the missing equations. If you have more
information about MathML in EPUB, please add it to the bug report.
https://bugs.documentfoundation.org/show_bug.cgi?id=168015
I find it confusing that there is a "Export" and "Export As..." and they
offer different choices. In fact, I didn't see that xhtml was an option
until reading your email. I am happy to find that MathML is exported
there. I think the general population would be unaware that xhtml is the
correct format to choose. Any reason you don't get rid of the "no longer
actively maintained" HTML option and have HTML use the XHTML path which
seems much better?
For the PDF export, you should also be exporting MathML into the
document. The approach to use is to put the MathML into an "Associated
File" (it's an object in the PDF document, not something external). It
is attached to the /Formula tag. This is particularly important for
accessibility because AT can then pick up the MathML, speak it, braille
it, and allow users to navigate the math just as they would in HTML. I
can point you to documents that describe what to do and that have
examples of it if you would find that helpful. Given that you can
generate MathML from the editor, it should be relatively straightforward
to simply add this information when you output the /Formula tag.
I have contacted Michael Weghorn about accessibility of equations in
PDF. He agrees that it is best to discuss problems on mailing list
[email protected] and report bugs and enhancement
requests in our bugtracker https://bugs.documentfoundation.org/.
Kind regards,
Regina
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