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nlbdev / mathml-guidelines

A collaboration on the MathML guidelines for marking up accessible math
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Discussion on the use of altimg attribute in <math> #31

Open samimaattaCelia opened 4 months ago

samimaattaCelia commented 4 months ago

Altimg attibute for <math> is not in MathML Core and it is in MathML 3, MathML 4.

What we know now

The experience is shared that reading systems that don't support MathML code, display the fallback image.

Edit: Removing this part, because it's about alttext: Some contents I have seen in the alttext: ASCIIMath, LaTeX or "math as it is spoken".

It is used at Tibi for ASCIIMath fallback. Remove end.

Edit: Addition about challenges:

Challenges

If the fallback image has errors in it, it will be difficult for us to fix it in post production. It would always have to be sent back to the supplier - unless somebody comes up with a way of producing the math image themselves. I think it can be done with MathJax, but I haven't looked into it.

Testing and developement

Lisahartun commented 2 months ago

But it is in MathML fundamentals? I would like to include it.

samimaattaCelia commented 2 months ago

Yes, it is in MathML 3 and MathML 4. If we strictly follow MathML Core, we shouldn't include the altimg. I do also think that we should include it, because some reading systems seem to support it (I haven't tested in a while, and don't remember though) and it will still be in MathML 4.

I also noticed that in the first comment I seem to have confused altimg and alttext and have talked about both of them. I will edit the comment.

samimaattaCelia commented 2 months ago

When writing the commit, I started thinking that is altimg only a visual fallback? Can you provide an alt text to it? How does it work together with alttext?