Japan Vendor Council (JVC) iconv Converters

New iconv converters are provided to allow for greater inter operability of data sharing within Japanese computing environments.

Summary of Change

New Japanese iconv conversion tables are provided which conform to the Open Group Japanese Vendor Council (TOG/JVC) CDE/Motif Technical working group recommendations in ensuring inter operability of ISO 10646/Unicode/JIS-0221 within Japanese computing environments.




	NOTE: JIS-0221 is the Japanese national standard equivalent to ISO-10646:1993 and Unicode 2.1.

The TOG/JVC has formalized three possible converter mappings for several characters. These mappings are:

JIS-0221 based on a strict JIS-0201 standard interpretation
JIS-0221 Extended which allows for greater co-existence in current ASCII-based (i.e. UNIX) environments
JIS-0221 based on Microsoft's Japanese mappings

Iconv converter tables are provided. These tables convert between HP's EUC and Shift-JIS (SJIS) characters to those specified by the strict JIS-0201 interpretation as well as the Microsoft™ Unicode and UTF-8 mappings. The JIS-0221 Extended conversion mappings are already supported within HP-UX.

Details of Change

Eight new iconv converter tables are provided to support the alternate mappings in round-trip conversions between EUC and Shift-JIS (SJIS) to/from Unicode and UTF-8.

List of new conversions:

eucJP0201 <-> ucs2 JIS-0201 interpretation
eucJPMS <-> ucs2 Microsoft interpretation
sjis0201 <-> ucs2 JIS-0201 interpretation
sjisMS <-> ucs2 Microsoft interpretation

The following table illustrates the mapping variances between converter tables when converting between EUC and different interpretations of Unicode character mappings:




	NOTE: The JIS-0201 Extended (Unix) mappings, already available in HP-UX, are referenced in this table as eucJP.

Table 9-7 EUC Unicode Character Mapping Conversions

EUC :    eucJP0201     eucJP         eucJPMS
        UCS2 mapping  UCS2 mapping   UCS2 mapping
------------------------------------------------- 
0x5C     0x00A5 ----- 0x005C         0x005C 
0x7E     0x203E ----- 0x007E         0x007E
 
0xA1B1   0xFFE3 ----- 0x203E  -----  0xFFE3
0xA1C0   0x005C ----- 0xFF3C         0xFF3C 
0xA1EF   0xFFE5 ----- 0x00A5  -----  0xFFE5
 
0xA1BD   0x2014       0x2014  -----  0x2015 
0xA1C1   0x301C       0x301C  -----  0xFF5E 
0xA1C2   0x2016       0x2016  -----  0x2225 
0xA1DD   0x2212       0x2212  -----  0xFF0D 
0xA1F1   0x00A2       0x00A2  -----  0xFFE0 
0xA1F2   0x00A3       0x00A3  -----  0xFFE1 
0xA2CC   0x00AC       0x00AC  -----  0xFFE2 
 
0x8FA2B7 0x007E ----- 0xFF5E         0xFF5E 
0x8FA2C3 0x00A6       0x00A6  -----  0xFFE4

The following table illustrates the mapping variances between converter tables when converting between SJIS and different interpretations of Unicode character mappings. (Note that the JIS-0201 Extended (Unix) mappings are already available on HP-UX, referenced in this table as SJIS.)

Table 9-8 SJIS Unicode Character Mapping Conversions

SJIS :     sjis0201       SJIS        sjisMS 
         UCS2 mapping   UCS2 mapping  UCS2 mapping
 --------------------------------------------------- 
0x5C      0x00A5 -----  0x005C        0x005C 
0x7E      0x203E -----  0x007E        0x007E 
0x8150    0xFFE3 -----  0x203E -----  0xFFE3 
0x815F    0x005C -----  0xFF3C        0xFF3C 
0x818F    0xFFE5 -----  0x00A5 -----  0xFFE5 
0x815C    0x2014        0x2014 -----  0x2015 
0x8160    0x301C        0x301C -----  0xFF5E 
0x8161    0x2016        0x2016 -----  0x2225 
0x817C    0x2212        0x2212 -----  0xFF0D 
0x8191    0x00A2        0x00A2 -----  0xFFE0 
0x8192    0x00A3        0x00A3 -----  0xFFE1 
0x81CA    0x00AC        0x00AC -----  0xFFE2

Impact

These converters require 0.6MB of additional disk space.

No additional memory requirements are needed.

Compatibility

There are no compatibility issues involved with the addition of this feature.

Performance

There is no impact to performance.

Obsolescence

Not applicable.

Documentation

No documentation changes were necessary.