The default is listed as "top", but it should be "bot".
Make it "bot".
Part 4, 7.1.2.84
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Proposed Disposition of DIS 29500 Comment ECMA-0063 (Modified: 2007-11-11) Agreed; the text in ยง7.1.2.84, page 5055, lines 19-20, will be changed, as follows: This element specifies the position of the bar in the bar object; the default is ‘bot’ ,’top,’ signifying the mathematical overbar .
