On this page of my site: http://docs.gl/gl4/glBlendEquation
I have some code that looks like:
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
<mml:mfenced open="(" close=")">
<mml:msub><mml:mi mathvariant="italic">R</mml:mi>
<mml:mi mathvariant="italic">s</mml:mi>
</mml:msub>
<mml:msub><mml:mi mathvariant="italic">G</mml:mi>
<mml:mi mathvariant="italic">s</mml:mi>
</mml:msub>
<mml:msub><mml:mi mathvariant="italic">B</mml:mi>
<mml:mi mathvariant="italic">s</mml:mi>
</mml:msub>
<mml:msub><mml:mi mathvariant="italic">A</mml:mi>
<mml:mi mathvariant="italic">s</mml:mi>
</mml:msub>
</mml:mfenced>
</mml:math>
and in other places it looks like:
<math overflow="scroll">
<mrow>
<mi mathvariant="italic">Rr</mi>
<mo>=</mo>
<mrow>
<msub><mi mathvariant="italic">R</mi>
<mi mathvariant="italic">s</mi>
</msub>
<mo></mo>
<msub><mi mathvariant="italic">s</mi>
<mi mathvariant="italic">R</mi>
</msub>
<mo>+</mo>
<msub><mi mathvariant="italic">R</mi>
<mi mathvariant="italic">d</mi>
</msub>
<mo></mo>
<msub><mi mathvariant="italic">d</mi>
<mi mathvariant="italic">R</mi>
</msub>
</mrow>
</mrow>
</math>
The MathML markup in the places with the namespace prefix don't work, but the ones without the prefix seem to work just fine.
I could do a find and replace and remove the mml in all of my files, but I have hundreds of files and I would prefer to fix it if I can by editing my single shared header file. Is this possible?
If you want to use namespace prefixed elements in HTML, you must use XHTML, including serving your page with an application/xhtml+xml media type. Note that your page markup is, despite your doctype, not well-formed XML, so you would need to fix that.
Otherwise, browsers will use an HTML parser. The HTML parser doesn't know about namespace prefixes, it just knows that <math>, <mrow>, <mi> etc are MathML elements. So in that case, you must convert your MathML to not use prefixes.