w3c / w3c/mathml-core

Unclear how to use `Operators_fence` special table

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HTML
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Description

The Operators_fence special table has the entry {U+0331}, which taken at face value is the code point for a combining below macron. But that is clearly not a fence. It is, however, what you get for the content string "||" after applying Step 2.3 of the algorithm to determine the category of an operator.

Should this table then be utilized by first applying the above replacement to an input string before performing a lookup, or is this the only exception? Regardless of the answer, I think a comment explaining it should be added to the spec.

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Research direction

Read the Operators_fence special table and the linked Step 2.3 algorithm in the MathML Core specification. Determine whether lookup should apply the replacement to the input or treat U+0331 as an exception, then add a comment explaining the decided behavior in the specification.

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Assessment

Tech stack
html
Domain
documentation
Issue type
Documentation
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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