Re: Aw: New Character Property for Prepended Concatenation Marks

From: Asmus Freytag (t) <>
Date: Thu, 26 Nov 2015 02:50:51 -0800
On 11/26/2015 12:10 AM, "Jörg Knappen" wrote:
I wonder how this concept relates to mathematical notation, especially the root sign.

It doesn't, for several reasons.

One, because mathematical formatting has its own rules, which are not formalized by Unicode.

Two, because these marks all establish a run that is bounded, usually by the first non digit, else by the first non-word character. The square root applies to arbitrary text (matching a  part of a mathematical expression).

If you want to define its scope in "plain text" you have to use parens, for example.

--Jörg Knappen
Gesendet: Mittwoch, 25. November 2015 um 23:34 Uhr
Betreff: New Character Property for Prepended Concatenation Marks

The Unicode Technical Committee is seeking feedback on a proposal to define a new character property for the class of prepended concatenation marks, also referred to as prefixed format control characters or, more generically, as subtending marks. Characters in that class include U+0600 ARABIC NUMBER SIGN and U+06DD ARABIC END OF AYAH. The new property, named Prepended_Concatenation_Mark and targeted for Unicode 9.0, would provide a mechanism to handle subtending marks collectively via properties rather than by hardcoded enumeration. A detailed description of the issue and how to provide feedback are given in Public Review Issue #310.

Received on Thu Nov 26 2015 - 04:52:13 CST

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