Preserving RDFa, microdata etc on MathML source

[pkra]

A feature request via SO.

We should preserve microdata, RDFa etc. from the MathML source. In particular now that search engines are running more and more JavaScript.

[pkra]

This could extend to annotations for speech text.

[pkra]

Might also help provide #546

[pkra]

• everything that's not a MathML attribute should not be trimmed
• author config can specify exceptions

[dpvc]

The issue860 branch of my fork of MathJax preserve this type of data in the HTML-CSS and SVG output (it was always included in the NativeMML output). There is a new configuration parameter that controls what is (and isn't) included, that will need to be documented.

[pkra]

RE test. Would it be enough to start with a single MathML sample with a selection of attributes (rdfa, microdata, data-*, aria) and then checking that the attributes exist in the output? That would also tackle #502.

[dpvc]

There is also a new ignoreMMLattributes configuration parameter, so that needs to be tested as well. One also should check that the alt text makes it to the aria-label if the math element doesn't include one already. Finally, you should test both the main math element and some child element, since the data are to be preserved for any node.

[dpvc]

==> Merged (Nov. 2)

[pkra]

==> in documentation mathjax/MathJax-docs#78

[dpvc]

==> In Testsuite

MathMLToDisplay/issue860-1.html
MathMLToDisplay/issue860-2.html