Speech for Geometric “Line” Expressions

The legacy MathPlayer speech had a rule which rendered a left-right arrow (**Unicode 2194**) accent above two letters as a line. For example, the speech “the line J K” was given for the following MathML code:

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Currently, MathCAT reads such an expression as “quantity J K with left-right arrow above.” I would like to argue for going back to the interpretational style used in MathPlayer, e.g., “the line J K”, as this is likely the intended usage in >95% of digital content in the publishing world.

Also, depending upon the equation editor used, one can find more than one possible Unicode left-right arrow being used. While **U+2194** (“left-right arrow) seems to be most common, equations built with the Microsoft Math editor may end up using **U+20E1** (“combining left-right arrow”) since that is the left-right arrow one finds in the accent tab. [One can, however, use the LaTeX string \overleftrightarrow to create **U+2194**.] So, it may also be appropriate to also include MathML constructions where **U+20E1** is being applied as an accent over two letters as a valid case for the geometric “line” construct speech rule.

Start with the MathML example in the issue and locate the speech-rule handling for mover accents and geometric line expressions. Compare the current output for U+2194 with the proposed U+20E1 case. Done means the applicable two-letter expressions are spoken as “the line J K” rather than describing the arrow accent.

Written by the indexing model from the issue text.