Rick McGowan asked:
Can someone point more specifically to where it says anything about variation selectors? This pointer is to the table of contents/overview...
Well, at http://www.usefulcontent.org/docs/manuals/REC-MathML2-20010221/chapter6.htm l#chars_mathmlchars
You should be aware that MathML is undergoing revision. In part, this will address all the differences between Unicode and MathML which were being updated at the time in parallel.
A./
