"<mfenced>": Why is it marked as deprecated?

[johndeighan]

MDN URL: https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mfenced

What information was incorrect, unhelpful, or incomplete?

I'm looking at the MathML spec - both version 3 and version 4, and nowhere is any indication that mfenced is deprecated. The version 4 draft does include this statement: "Examples of features left out of MathML core but part of full MathML are mfenced, menclose, the elementary math elements, and linebreaking.", which does not indicate deprecation. Also, inexplicably, the document then goes on to define the mfenced element and how it works.

Specific section or headline?

What did you expect to see?

Did you test this? If so, how?

MDN Content page report details

• Folder: en-us/web/mathml/element/mfenced
• MDN URL: https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mfenced
• GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/mathml/element/mfenced/index.md
• Last commit: 1f771d1
• Document last modified: 2021-10-11T11:37:47.000Z

[Elchi3]

w3c/mathml#2 deprecated it.
Firefox removed it in https://bugzilla.mozilla.org/show_bug.cgi?id=1603773

Apparently the relevant spec for browsers is https://w3c.github.io/mathml-core/ these days.

[sideshowbarker]

Closing per #14779 (comment)