Fwd: Errors in APL-ISO-IR-68.TXT

[Harriet Riddle]

Re-sending this since I inadvertently sent it to the bounces address.

-------- Forwarded Message --------
Subject: 	Errors in APL-ISO-IR-68.TXT
Date: 	Mon, 25 Apr 2022 23:48:58 +0100
From: 	Harriet Riddle <harjitmoe at outlook.com>
To: 	Unicode <unicode-bounces at corp.unicode.org>



Two of the lines in APL-ISO-IR-68.TXT ( 
https://www.unicode.org/Public/MAPPINGS/VENDORS/MISC/APL-ISO-IR-68.TXT ) 
read as follows:

0x5A085F    0x233E    #    APL FUNCTIONAL SYMBOL CIRCLE JOT

and:

0x5F085A    0x233E    #    APL FUNCTIONAL SYMBOL CIRCLE JOT

0x5A is a left shoe (U+2282 ⊂ SUBSET OF) and 0x5F is a minus sign 
(mapped in this file to 0x002D HYPHEN-MINUS).  While a ISO-IR-68 
backspace (0x08) composition of these two could theoretically compose 
some form of element-of sign, the APL "epsilon" or element-of sign is an 
atomic glyph at 0x45 (mapped here to 0x220A ∊ SMALL ELEMENT OF), so 
these two sequences are probably unused in reality.  In any case, they 
do not correspond to U+233E ⌾ APL FUNCTIONAL SYMBOL CIRCLE JOT which is, 
as the name suggests, the composition of the circle (0x25CB ○ WHITE 
CIRCLE, 0x4F in ISO-IR-68) and the jot (0x2218 ∘ RING OPERATOR, 0x4A in 
ISO-IR-68).

The mappings should probably be amended to:

0x4A084F    0x233E    #    APL FUNCTIONAL SYMBOL CIRCLE JOT

and:

0x4F084A    0x233E    #    APL FUNCTIONAL SYMBOL CIRCLE JOT

—Har.
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