RE: Beyond 17 planes, was: Java char and Unicode 3.0+

From: Peter Constable (
Date: Fri Oct 17 2003 - 03:01:53 CST

> -----Original Message-----
> From: []
> Behalf Of Addison Phillips [wM]

> When all of the planes less than 16 are full and the possibility of
> exhausting code points become actually apparent (but not before), the
> should reserve a range of code points in plane 16 to serve as "astral
> surrogates" and another to serve as "astral high surrogates". UTF-16
> the
> use a pair of surrogate pairs to address the higher planes thereby
> And we won't all have to muck with our implementations to support this
> stuff.

I believe I suggested pretty much the same thing when the very same
topic was discussed (to an equally fruitless end) about 5 years ago.

Peter Constable
Globalization Infrastructure and Font Technologies
Microsoft Windows Division

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