Unicode 2.1 was released in early 1998. The first public release was Unicode 2.1.2 in May 1998. This was followed by updates to Unicode 2.1.5 in August, 1998, Unicode 2.1.8 in December 1998 and Unicode 2.1.9 in April 1999. The previous version was Unicode 2.0 and the next version is Unicode 3.0.

The Unicode Consortium defines Unicode 2.1 as : The Unicode Standard, Version 2.0 Reading, MA, Addison-Wesley Developers Press, 1996. ISBN 0-201-48345-9, plus the changes enumerated in http://www.unicode.org/unicode/reports/tr8.

Although packed with revisions and changes, Unicode 2.1 adds only two new characters :

All the rest of the changes involved subtle changes in the associated character data, such as General Category, Bidirectional Category, Combining Class and Case Mapping. Below I list the changes in general and bidirectional categories, except where they become unweildy.

 

2.1.9

16 characters were altered from 2.1.8 to 2.1.9

Latin-1 Supplement


U+00A0       no break space had its Bidirectional Category changed from Whitespace to CommonNumberSeparator

 

Greek and Coptic


U+0374   ʹ   Greek numeral sign had its General Category changed from Punctuation, Other to Symbol, Modifier
U+0374   ʹ   Greek numeral sign had its Bidirectional Category changed from LeftToRight to OtherNeutrals
U+0375   ͵   Greek lower numeral sign had its General Category changed from Punctuation, Other to Symbol, Modifier
U+0375   ͵   Greek lower numeral sign had its Bidirectional Category changed from LeftToRight to OtherNeutrals

 

Tibetan


U+0F3E     Tibetan sign yar tshes had its Bidirectional Category changed from OtherNeutrals to LeftToRight
U+0F3F   ༿   Tibetan sign mar tshes had its Bidirectional Category changed from OtherNeutrals to LeftToRight

 

General Punctuation


U+2007     figure space had its Bidirectional Category changed from CommonNumberSeparator to Whitespace
U+2028     line separator had its Bidirectional Category changed from ParagraphSeparator to Whitespace

 

CJK Symbols and Punctuation


U+3005     ideographic iteration mark had its Bidirectional Category changed from OtherNeutrals to LeftToRight
U+3031     vertical kana repeat mark had its Bidirectional Category changed from OtherNeutrals to LeftToRight
U+3032     vertical kana repeat with voiced sound mark had its Bidirectional Category changed from OtherNeutrals to LeftToRight
U+3033     vertical kana repeat mark upper half had its Bidirectional Category changed from OtherNeutrals to LeftToRight
U+3034     vertical kana repeat with voiced sound mark upper half had its Bidirectional Category changed from OtherNeutrals to LeftToRight
U+3035     vertical kana repeat mark lower half had its Bidirectional Category changed from OtherNeutrals to LeftToRight

 

Halfwidth and Fullwidth Forms


U+FF9E     halfwidth Katakana voiced sound mark had its Bidirectional Category changed from OtherNeutrals to LeftToRight
U+FF9F     halfwidth Katakana semi voiced sound mark had its Bidirectional Category changed from OtherNeutrals to LeftToRight
U+FFE8     halfwidth forms light vertical had its General Category changed from Symbol, Math to Symbol, Other

 

2.1.8

29 characters were altered from 2.1.5 to 2.1.8

Greek and Coptic


U+037E   ;   Greek question mark had its Bidirectional Category changed from LeftToRight to OtherNeutrals
U+0387   ·   Greek ano teleia had its Bidirectional Category changed from LeftToRight to OtherNeutrals

 

Devanagari


U+0950     Devanagari om had its General Category changed from Symbol, Other to Letter, Other

 

Bengali


U+09F2     Bengali rupee mark had its Bidirectional Category changed from LeftToRight to EuropeanNumberTerminator
U+09F3     Bengali rupee sign had its Bidirectional Category changed from LeftToRight to EuropeanNumberTerminator

 

Gujarati


U+0AD0     Gujarati om had its General Category changed from Symbol, Other to Letter, Other

 

Thai


U+0E2F     Thai character paiyannoi had its General Category changed from Punctuation, Other to Letter, Other

 

Lao


U+0EAF     Lao ellipsis had its General Category changed from Punctuation, Other to Letter, Other

 

Tibetan


U+0F00     Tibetan syllable om had its General Category changed from Symbol, Other to Letter, Other
U+0F3A     Tibetan mark gug rtags gyon had its Bidirectional Category changed from LeftToRight to OtherNeutrals
U+0F3B     Tibetan mark gug rtags gyas had its Bidirectional Category changed from LeftToRight to OtherNeutrals
U+0F3C     Tibetan mark ang khang gyon had its Bidirectional Category changed from LeftToRight to OtherNeutrals
U+0F3D     Tibetan mark ang khang gyas had its Bidirectional Category changed from LeftToRight to OtherNeutrals
U+0F3E     Tibetan sign yar tshes had its General Category changed from Punctuation, Open to Mark, Spacing Combining
U+0F3E     Tibetan sign yar tshes had its Bidirectional Category changed from LeftToRight to OtherNeutrals
U+0F3F   ༿   Tibetan sign mar tshes had its General Category changed from Punctuation, Close to Mark, Spacing Combining
U+0F3F   ༿   Tibetan sign mar tshes had its Bidirectional Category changed from LeftToRight to OtherNeutrals
U+0F88     Tibetan sign lce tsa can had its General Category changed from Symbol, Other to Letter, Other
U+0F89     Tibetan sign mchu can had its General Category changed from Symbol, Other to Letter, Other
U+0F8A     Tibetan sign gru can rgyings had its General Category changed from Symbol, Other to Letter, Other
U+0F8B     Tibetan sign gru med rgyings had its General Category changed from Symbol, Other to Letter, Other

 

Greek Extended


U+1FBE     Greek prosgegrammeni had its General Category changed from Letter, Uppercase to Letter, Lowercase

 

Letterlike Symbols


U+2118     script capital p had its General Category changed from Letter, Uppercase to Letter, Lowercase

 

CJK Symbols and Punctuation


U+3006     ideographic closing mark had its General Category changed from Punctuation, Other to Letter, Other
U+3006     ideographic closing mark had its Bidirectional Category changed from OtherNeutrals to LeftToRight
U+3007     ideographic number zero had its Bidirectional Category changed from OtherNeutrals to LeftToRight

 

Hiragana


U+309B     Katakana Hiragana voiced sound mark had its General Category changed from Letter, Modifier to Symbol, Modifier
U+309B     Katakana Hiragana voiced sound mark had its Bidirectional Category changed from LeftToRight to OtherNeutrals
U+309C     Katakana Hiragana semi voiced sound mark had its General Category changed from Letter, Modifier to Symbol, Modifier
U+309C     Katakana Hiragana semi voiced sound mark had its Bidirectional Category changed from LeftToRight to OtherNeutrals

 

Katakana


U+30FB     Katakana middle dot had its General Category changed from Punctuation, Other to Punctuation, Connector

 

Halfwidth and Fullwidth Forms


U+FF65     halfwidth Katakana middle dot had its General Category changed from Punctuation, Other to Punctuation, Connector
U+FF9E     halfwidth Katakana voiced sound mark had its Bidirectional Category changed from LeftToRight to OtherNeutrals
U+FF9F     halfwidth Katakana semi voiced sound mark had its Bidirectional Category changed from LeftToRight to OtherNeutrals  

2.1.5

Unicode 2.1.5 introduced the General Categories Punctuation, Initial quote and Punctuation, Final quote

There were 622 Bidirectional Category changes and 16 General Category changes from 2.1.2 to 2.1.5

Latin-1 Supplement


U+00AB   «   left pointing double angle quotation mark had its General Category changed from Punctuation, Open to Punctuation, Initial quote
U+00BB   »   right pointing double angle quotation mark had its General Category changed from Punctuation, Close to Punctuation, Final quote

 

Tibetan


U+0F3E     Tibetan sign yar tshes had its General Category changed from Mark, Spacing Combining to Punctuation, Open
U+0F3F   ༿   Tibetan sign mar tshes had its General Category changed from Mark, Spacing Combining to Punctuation, Close
U+0F88     Tibetan sign lce tsa can had its General Category changed from Mark, Non-Spacing to Symbol, Other
U+0F89     Tibetan sign mchu can had its General Category changed from Mark, Non-Spacing to Symbol, Other
U+0F8A     Tibetan sign gru can rgyings had its General Category changed from Mark, Non-Spacing to Symbol, Other
U+0F8B     Tibetan sign gru med rgyings had its General Category changed from Mark, Non-Spacing to Symbol, Other

 

General Punctuation


U+2018     left single quotation mark had its General Category changed from Punctuation, Open to Punctuation, Initial quote
U+2019     right single quotation mark had its General Category changed from Punctuation, Close to Punctuation, Final quote
U+201B     single high reversed 9 quotation mark had its General Category changed from Punctuation, Open to Punctuation, Initial quote
U+201C     left double quotation mark had its General Category changed from Punctuation, Open to Punctuation, Initial quote
U+201D     right double quotation mark had its General Category changed from Punctuation, Close to Punctuation, Final quote
U+201F     double high reversed 9 quotation mark had its General Category changed from Punctuation, Open to Punctuation, Initial quote
U+2039     single left pointing angle quotation mark had its General Category changed from Punctuation, Open to Punctuation, Initial quote
U+203A     single right pointing angle quotation mark had its General Category changed from Punctuation, Close to Punctuation, Final quote  

2.1.2

5 characters were altered from 2.0 to 2.1.2

Basic Latin


U+0026   &   ampersand had its Bidirectional Category changed from LeftToRight to OtherNeutrals
U+002E   .   full stop had its Bidirectional Category changed from EuropeanNumberSeparator to CommonNumberSeparator
U+0040   @   commercial at had its Bidirectional Category changed from LeftToRight to OtherNeutrals

 

General Punctuation


U+2007     figure space had its Bidirectional Category changed from EuropeanNumberSeparator to CommonNumberSeparator

 

CJK Symbols and Punctuation


U+301F     low double prime quotation mark had its General Category changed from Punctuation, Open to Punctuation, Close
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