add table of suggested chars for accents/lines#552
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| proper positioning when used as accents. This section has recommendations | ||
| for which characters to use as accents in MathML. It is important to note that | ||
| only a limited number of fonts support proper mathematical layout. | ||
| Browsers and likely other software currently require the use of fonts with an OpenType MATH |
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| Browsers and likely other software currently require the use of fonts with an OpenType MATH | |
| Browsers and likely other software currently require the use of fonts with an OpenType MATH | |
| table. |
davidcarlisle
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Jan 22, 2026
| <td>_</td> | ||
| <td><math><mover accent="true"><mi>x</mi><mo>_</mo></mover></math></td> | ||
| <td><math><mover accent="true"><mrow><mi>x</mi><mo>+</mo><mi>y</mi></mrow><mo stretchy='true'>_</mo></mover></math></td> | ||
| <td>U+00AF (overline) doesn't stretch in Chrome and displays poorly in Safari. U+0304 and U+0305 don't stretch anywhere</td> |
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I don't think we can be making comparative judgements of specific implementations in the spec, I think we should just have a paragraph describing the issue. We can link to appendix B.3 of mathml-core (assuming we land the PR to update that and also, we could link to MathFonts.github.io accents test to tell people to see which characters stretch in current implementations.
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MathML Core B3 has been updated so now isn't totally wrong. https://w3c.github.io/mathml-core/#combining-character-equivalences There is more that could be said there but I think we can finalize things in the main spec by referencing that now. |
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This still needs work/discussion. Implementations are all over the place (or don't work for any character). Not sure what we should do.