1793549 - Remove support for MathML length values thinmathspace, mediummathspace, thickmathspace, etc

Status: NEW

(Core :: MathML, task)

Description

[Frédéric Wang (:fredw)]

Follow-up of bug 1574750.

Comment 1

[Frédéric Wang (:fredw)]

Feedback from Math WG is that polyfill is being prepared and these can be removed from WebKit/Firefox: https://github.com/w3c/mathml/issues/75#issuecomment-1272227573
Quick check of the status for some LaTeX-to-MathML converters: https://github.com/w3c/mathml/issues/75

I believe we can give a try.

Comment 2

[Frédéric Wang (:fredw)]

• Use counter for MathML_DeprecatedMathSpaceValue is small, around 0.002%
• However the count of DeprecatedMathSpaceValue with respect to the count of page with MathML is significant, around 6% for beta 114-116.
• Latest reply from moritz schubotz (May 2023) is that Wikipedia (which is probably one of the biggest source of MathML content) is still using these deprecated values. MediaWiki is rewriting their LaTeX-to-MathML implementation which won't use these values anymore so probably we can reevaluate after that.

Comment 3

[Frédéric Wang (:fredw)]

edit: counter was renamed MathML_DeprecatedMathSpaceValue2 in https://phabricator.services.mozilla.com/D185399

beta	mathml	mathspace	
120	14750	912	   6,18 %
119	13380	1040	   7,77 %
118	10500	1150	   10,95 %
117	10190	964	   9,46 %
116	11350	1190	   10,48 %
115	15440	1840	   11,92 %
114	14400	1230	   8,54 %
113	15430	1580	   10,24 %