Re: A Great Idea (tm) about reimplementing NLS.

[Kari Hurtta <hurtta+linux-kernel@leija.mh.fmi.fi>]

> fredagen den 17 juni 2005 15.23 skrev Måns Rullgård:
> > Some characters can be encoded in several equally shortest ways.  
> 
> No they cannot. How to encode characters i explicitly and well defined. If you 
> don't follow the rules you are simply not producing UTF-8, but something 
> else.
> 
> Every unicode character has exactly one  UTF-8 representation. 
> 
> -- robin

You are confused between unicode characters and unicode codepoints.

Every unicode codepoint has exactly one  UTF-8 representation.

Unicode characters may use one ore more unicode codepoints.

Some characters have also representation with one codepoint, but not all.

For example

	LATIN CAPITAL LETTER A WITH ACUTE

have presentation	0041 0301

That is two unicode codepoints.  That character
have also other (compatibility) representation

that is			00C1


But consider (somewhat imaginary) character

	LATIN CAPITAL LETTER A WITH GRAVE AND CIRCUMFLEX

that have presentation	0041 0300 0302

but it have also presentation	0041 0302 0300


Both presentations are equal short.



/ Kari Hurtta	


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