- From: Martin Duerst <duerst@w3.org>
- Date: Tue, 17 Sep 2002 05:40:20 +0900
- To: Markus Scherer <markus.scherer@jtcsv.com>, charsets <ietf-charsets@iana.org>
looks okay to me. Regards, Martin. At 09:31 02/09/16 -0700, Markus Scherer wrote: >Harald Tveit Alvestrand wrote: > > > thanks - please send the revised BOCU-1 registration with the warning in > > it, so that I can pass it to IANA and say "I approve". > > > > I think this has been discussed enough now. > >Here it is, the previous refresh from 2002-aug-22 with >your (Harald's) reformulation of Martin's warning about UTF-8 being the >preferred charset. > >Thank you very much, >markus > >---- 8< ---- >Charset name: BOCU-1 > >Charset aliases: (none, except for the implicit csBOCU-1) > >Suitability for use in MIME text: Yes > >Published specifications: > Specification of BOCU-1 with sample code for conversion to/from Unicode: > http://www.unicode.org/notes/tn6/ > > Description of the general "BOCU" algorithm, > with a link to the BOCU-1 specification: > >http://oss.software.ibm.com/icu/docs/papers/binary_ordered_compression_for_ >unicode.html > > A converter implementation that is conformant to this specification is > available in ICU (http://oss.software.ibm.com/icu/), an open-source > library. > The BOCU-1 converter C source code is in icu/source/common/ucnvbocu.c: > >http://oss.software.ibm.com/cvs/icu/~checkout~/icu/source/common/ucnvbocu.c > > CCS & CES: The BOCU-1 charset is a combination of the > Unicode/ISO 10646 Coded Character Set (CCS) with > the Character Encoding Scheme (CES) specified in > the above document. It covers exactly the > UTF-16-reachable subset of ISO 10646. > >ISO 10646 equivalency table: > Algorithmic, see published specification and sample code. > >Additional information: > BOCU-1 is an encoding (CES/TES) of Unicode/ISO 10646 > for the storage and exchange of text data. > It is stateful and provides a good byte/code point ratio while > being directly usable in SMTP emails, database fields and other contexts. > > BOCU-1 combines the wide applicability of UTF-8 with the compactness > of SCSU. > It is useful for short strings and maintains code point order. > BOCU-1 does not encode most ASCII characters with US-ASCII byte values. > > BOCU-1 is intended for limited use in special situations > where the use of this charset can be preconfigured or negotiated. > The preferred and most widely supported encoding for > Unicode/ISO 10646 on the Internet is UTF-8. > > There is a Unicode signature byte sequence defined > (FB EE 28, see specification). > > BOCU-1 is suitable for > - databases: maintains Unicode code point order > - emails: directly suitable for MIME text > - CVS and similar: deterministic and resets at CR and LF > > BOCU-1 is not suitable for > - efficient internal processing (convert to UTF-8/16/32) > - contexts where encoding declarations _in_ documents _must_ be > ASCII-readable > >Person & email address to contact for further information: > Markus W. Scherer > IBM Globalization Center of Competency > 5600 Cottle Road > Mail Stop: 50-2/B11 > San Jose, CA 95193 > USA > > markus.scherer@jtcsv.com > markus.scherer@us.ibm.com > >Intended usage: LIMITED USE > >---- >Suggested MIBenum value: 1020 > (first available in Unicode/ISO 10646 range; like SCSU [which is 1011]) > > >Thank you for your consideration, > >markus >
Received on Monday, 16 September 2002 17:23:25 UTC