Accent rendering with <mover accent="true">

[orbita2d]

Rendering common accents is, in my opinion, overly awkward.

e.g. Rendering a circumflex (hat) properly requires

<math>
  <mover accent="true">
    <mi>H</mi>
    <mo stretchy="false">&#x0302;</mo>
  </mover>
</math>

I understand that this is aimed at flexibility, but common accents like this should really be able to have special treatment for proper rendering. The MathMl named element "Hat" is the Unicode ^, which does not render well as a hat.

My opinion here is that these common accents should be treated as a special case, in the same notation:

<math>
  <mover accent="true">
    <mi>H</mi>
    <mo>&Hat;</mo>
  </mover>
</math>

rendering the operator properly.

See https://en.wikipedia.org/wiki/Hat_notation, for examples of how this notation should look.

I would appreciate any discussion on the issue.

[dginev]

Here are the two examples from the issue description in a codepen

Screncaps:

math font	Chrome	Firefox
default font STIX NewCM Sans

[NSoiffer]

The other part of this issue is what characters should be used. This was discussed in w3c/mathml#247.