mgbales

Third; it's a necessary tool to work around [known issues with MathML](https://w3c.github.io/mathml-docs/gap-analysis/) and provide author-provided semantic meaning when there is none to be had in MathML itself.

@NSoiffer, agree that the reading experience could be potentially confusing. However, we have to support several different genres of notation, and while immediate context does help, our users are in...