From: Otto Stolz (Otto.Stolz@uni-konstanz.de)
Date: Tue Mar 28 2006 - 07:39:31 CST
Hello,
Kornkreismuster@web.de schrieb:
> I got some problems understanding UTF-7.
A short discussion (about 10 lines in German + 2 examples)
can be found at <http://www.systems.uni-konstanz.de/Otto/Vortrag/Charset/Unicode-Grundlagen.html#UU-7>.
> 2. Can you encode the full range of Unicode[...]?
Yes.
> 1. Is this format directly encoding the Unicode Codecharts, or an encoded UTF-version?
As the answer to 2, above, is "yes", you could describe UTF-7 as an
encoding of Unicode codepoints. However, you can understand the encoding
better, if you describe it as a simple algorithm on top of UTF-16.
> 3. When it encodes a stream, does this format need any information,
> with what UTF-X Format the string has been encoded?
Of course, any algorithm must know how its input is encoded.
But beyond this truism, no other info is required by an UTF-7 encoder.
> 4. Can you use this just for UTF-16 (BE/LE) or for any UTF format?
Any UTF is capable of encoding arbitrary Unicode code points,
hence this question is beside the point.
> 5. Can somebody tell me where to get an easy to read & complete description
of the UTF-7 Format??
What about RFC 2152 <http://rfc-ref.org/RFC-TEXTS/2152/>?
Best wishes,
Otto Stolz
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