Re: Displaying Plane 1 characters (was Re: TV teletext)

From: John Cowan (
Date: Wed Oct 14 1998 - 11:57:29 EDT

Paul Keinanen wrote:

> What is the technical readines in different computer environments to display
> non-BMP characters ? The already overstretched cmap structure in True Type
> Fonts are limited to 16 bits. What is the situation with various Type x
> systems ?

I believe the usual approach is treat an Astral Plane character as
a mandatory ligature. Thus the character at U+10000 would be
treated as a ligature of U+D800 and U+DC00.

John Cowan
	You tollerday donsk?  N.  You tolkatiff scowegian?  Nn.
	You spigotty anglease?  Nnn.  You phonio saxo?  Nnnn.
		Clear all so!  'Tis a Jute.... (Finnegans Wake 16.5)

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