RE: ID_Start, ID_Continue, and stability extensions

From: Whistler, Ken <ken.whistler_at_sap.com>
Date: Wed, 23 Apr 2014 17:48:03 +0000

Mathias,

> > What are the “stability extensions” this document refers to?
> >
> Here are the code points that match the respective property according to
> `DerivedCoreProperties.txt`, yet don’t match these properties if you’re
> adding/removing the categories manually based on the property definition in
> TR31.
>
> `ID_Start`:
>
> * U+2118
> * U+212E
> * U+309B
> * U+309C
>
> `ID_Continue`:
>
> * U+00B7
> * U+0387
> * U+1369
> * U+1370
> * U+1371
> * U+19DA
>
> Why these differences?

See the listings for Other_ID_Start and Other_ID_Continue in PropList.txt.
Those are your "stability extensions" for the derivation of the identifier-related
derived properties.

--Ken

# ================================================

2118 ; Other_ID_Start # Sm SCRIPT CAPITAL P
212E ; Other_ID_Start # So ESTIMATED SYMBOL
309B..309C ; Other_ID_Start # Sk [2] KATAKANA-HIRAGANA VOICED SOUND MARK..KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK

# Total code points: 4

# ================================================

00B7 ; Other_ID_Continue # Po MIDDLE DOT
0387 ; Other_ID_Continue # Po GREEK ANO TELEIA
1369..1371 ; Other_ID_Continue # No [9] ETHIOPIC DIGIT ONE..ETHIOPIC DIGIT NINE
19DA ; Other_ID_Continue # No NEW TAI LUE THAM DIGIT ONE

# Total code points: 12

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Received on Wed Apr 23 2014 - 12:49:23 CDT

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