1# 2# Copyright (C) 2016 and later: Unicode, Inc. and others. 3# License & terms of use: http://www.unicode.org/copyright.html 4# Copyright (C) 2002-2016, International Business Machines Corporation 5# and others. All Rights Reserved. 6# 7# file: word.txt 8# 9# ICU Word Break Rules 10# See Unicode Standard Annex #29. 11# These rules are based on UAX #29 Revision 29 for Unicode Version 9.0 12# with additions for Emoji Sequences from https://goo.gl/cluFCn 13# 14# Note: Updates to word.txt will usually need to be merged into 15# word_POSIX.txt also. 16 17############################################################################## 18# 19# Character class definitions from TR 29 20# 21############################################################################## 22 23!!chain; 24 25 26# 27# Character Class Definitions. 28# 29 30$CR = [\p{Word_Break = CR}]; 31$LF = [\p{Word_Break = LF}]; 32$Newline = [\p{Word_Break = Newline} ]; 33$Extend = [\p{Word_Break = Extend}]; 34$ZWJ = [\p{Word_Break = ZWJ}]; 35$Regional_Indicator = [\p{Word_Break = Regional_Indicator}]; 36$Format = [\p{Word_Break = Format}]; 37$Katakana = [\p{Word_Break = Katakana}]; 38$Hebrew_Letter = [\p{Word_Break = Hebrew_Letter}]; 39$ALetter = [\p{Word_Break = ALetter}]; 40$Single_Quote = [\p{Word_Break = Single_Quote}]; 41$Double_Quote = [\p{Word_Break = Double_Quote}]; 42$MidNumLet = [\p{Word_Break = MidNumLet}]; 43$MidLetter = [\p{Word_Break = MidLetter}]; 44$MidNum = [\p{Word_Break = MidNum}]; 45$Numeric = [\p{Word_Break = Numeric}]; 46$ExtendNumLet = [\p{Word_Break = ExtendNumLet}]; 47$E_Base = [\p{Word_Break = EB}\U0001F3C2\U0001F3C7\U0001F3CC\U0001F46A-\U0001F46D\U0001F46F\U0001F574\U0001F6CC]; 48$E_Modifier = [\p{Word_Break = EM}]; 49 50# Data for Extended Pictographic scraped from CLDR common/properties/ExtendedPictographic.txt, r12773 51$Extended_Pict = [\U0001F774-\U0001F77F\u2700-\u2701\u2703-\u2704\u270E\u2710-\u2711\u2765-\u2767\U0001F030-\U0001F093\U0001F094-\U0001F09F\U0001F10D-\U0001F10F\U0001F12F\U0001F16C-\U0001F16F\U0001F1AD-\U0001F1E5\U0001F203-\U0001F20F\U0001F23C-\U0001F23F\U0001F249-\U0001F24F\U0001F252-\U0001F2FF\U0001F7D5-\U0001F7FF\U0001F000-\U0001F003\U0001F005-\U0001F02B\U0001F02C-\U0001F02F\U0001F322-\U0001F323\U0001F394-\U0001F395\U0001F398\U0001F39C-\U0001F39D\U0001F3F1-\U0001F3F2\U0001F3F6\U0001F4FE\U0001F53E-\U0001F548\U0001F54F\U0001F568-\U0001F56E\U0001F571-\U0001F572\U0001F57B-\U0001F586\U0001F588-\U0001F589\U0001F58E-\U0001F58F\U0001F591-\U0001F594\U0001F597-\U0001F5A3\U0001F5A6-\U0001F5A7\U0001F5A9-\U0001F5B0\U0001F5B3-\U0001F5BB\U0001F5BD-\U0001F5C1\U0001F5C5-\U0001F5D0\U0001F5D4-\U0001F5DB\U0001F5DF-\U0001F5E0\U0001F5E2\U0001F5E4-\U0001F5E7\U0001F5E9-\U0001F5EE\U0001F5F0-\U0001F5F2\U0001F5F4-\U0001F5F9\u2605\u2607-\u260D\u260F-\u2610\u2612\u2616-\u2617\u2619-\u261C\u261E-\u261F\u2621\u2624-\u2625\u2627-\u2629\u262B-\u262D\u2630-\u2637\u263B-\u2647\u2654-\u265F\u2661-\u2662\u2664\u2667\u2669-\u267A\u267C-\u267E\u2680-\u2691\u2695\u2698\u269A\u269D-\u269F\u26A2-\u26A9\u26AC-\u26AF\u26B2-\u26BC\u26BF-\u26C3\u26C6-\u26C7\u26C9-\u26CD\u26D0\u26D2\u26D5-\u26E8\u26EB-\u26EF\u26F6\u26FB-\u26FC\u26FE-\u26FF\u2388\U0001FA00-\U0001FFFD\U0001F0A0-\U0001F0AE\U0001F0B1-\U0001F0BF\U0001F0C1-\U0001F0CF\U0001F0D1-\U0001F0F5\U0001F0AF-\U0001F0B0\U0001F0C0\U0001F0D0\U0001F0F6-\U0001F0FF\U0001F80C-\U0001F80F\U0001F848-\U0001F84F\U0001F85A-\U0001F85F\U0001F888-\U0001F88F\U0001F8AE-\U0001F8FF\U0001F900-\U0001F90F\U0001F91F\U0001F928-\U0001F92F\U0001F931-\U0001F932\U0001F93F\U0001F94C-\U0001F94F\U0001F95F-\U0001F97F\U0001F992-\U0001F9BF\U0001F9C1-\U0001F9FF\U0001F6C6-\U0001F6CA\U0001F6E6-\U0001F6E8\U0001F6EA\U0001F6F1-\U0001F6F2\U0001F6D3-\U0001F6DF\U0001F6ED-\U0001F6EF\U0001F6F7-\U0001F6FF]; 52$EBG = [\p{Word_Break = EBG}]; 53$EmojiNRK = [[\p{Emoji}] - [\p{Word_Break = Regional_Indicator}\u002a\u00230-9©®™〰〽]]; 54 55$Han = [:Han:]; 56$Hiragana = [:Hiragana:]; 57 58 59# Dictionary character set, for triggering language-based break engines. Currently 60# limited to LineBreak=Complex_Context. Note that this set only works in Unicode 61# 5.0 or later as the definition of Complex_Context was corrected to include all 62# characters requiring dictionary break. 63 64$Control = [\p{Grapheme_Cluster_Break = Control}]; 65$HangulSyllable = [\uac00-\ud7a3]; 66$ComplexContext = [:LineBreak = Complex_Context:]; 67$KanaKanji = [$Han $Hiragana $Katakana]; 68$dictionaryCJK = [$KanaKanji $HangulSyllable]; 69$dictionary = [$ComplexContext $dictionaryCJK]; 70 71# leave CJK scripts out of ALetterPlus 72$ALetterPlus = [$ALetter-$dictionaryCJK [$ComplexContext-$Extend-$Control]]; 73 74 75# 76# Rules 4 Ignore Format and Extend characters, 77# except when they appear at the beginning of a region of text. 78# 79# TODO: check if handling of katakana in dictionary makes rules incorrect/void 80$KatakanaEx = $Katakana ($Extend | $Format | $ZWJ)*; 81$Hebrew_LetterEx = $Hebrew_Letter ($Extend | $Format | $ZWJ)*; 82$ALetterEx = $ALetterPlus ($Extend | $Format | $ZWJ)*; 83$Single_QuoteEx = $Single_Quote ($Extend | $Format | $ZWJ)*; 84$Double_QuoteEx = $Double_Quote ($Extend | $Format | $ZWJ)*; 85$MidNumLetEx = $MidNumLet ($Extend | $Format | $ZWJ)*; 86$MidLetterEx = $MidLetter ($Extend | $Format | $ZWJ)*; 87$MidNumEx = $MidNum ($Extend | $Format | $ZWJ)*; 88$NumericEx = $Numeric ($Extend | $Format | $ZWJ)*; 89$ExtendNumLetEx = $ExtendNumLet ($Extend | $Format | $ZWJ)*; 90$Regional_IndicatorEx = $Regional_Indicator ($Extend | $Format | $ZWJ)*; 91 92$Ideographic = [\p{Ideographic}]; 93$HiraganaEx = $Hiragana ($Extend | $Format | $ZWJ)*; 94$IdeographicEx = $Ideographic ($Extend | $Format | $ZWJ)*; 95 96## ------------------------------------------------- 97 98!!forward; 99 100 101# Rule 3 - CR x LF 102# 103$CR $LF; 104 105# Rule 3c ZWJ x (Extended_Pict | EmojiNRK). Precedes WB4, so no intervening Extend chars allowed. 106# 107$ZWJ ($Extended_Pict | $EmojiNRK); 108 109 110# Rule 4 - ignore Format and Extend characters, except when they appear at the beginning 111# of a region of Text. The rule here comes into play when the start of text 112# begins with a group of Format chars, or with a "word" consisting of a single 113# char that is not in any of the listed word break categories followed by 114# format char(s), or is not a CJK dictionary character. 115[^$CR $LF $Newline]? ($Extend | $Format | $ZWJ)+; 116 117$NumericEx {100}; 118$ALetterEx {200}; 119$HangulSyllable {200}; 120$Hebrew_LetterEx{200}; 121$KatakanaEx {400}; # note: these status values override those from rule 5 122$HiraganaEx {400}; # by virtue of being numerically larger. 123$IdeographicEx {400}; # 124 125$E_Base ($Extend | $Format | $ZWJ)*; 126$E_Modifier ($Extend | $Format | $ZWJ)*; 127$Extended_Pict ($Extend | $Format | $ZWJ)*; 128 129# 130# rule 5 131# Do not break between most letters. 132# 133($ALetterEx | $Hebrew_LetterEx) ($ALetterEx | $Hebrew_LetterEx) {200}; 134 135# rule 6 and 7 136($ALetterEx | $Hebrew_LetterEx) ($MidLetterEx | $MidNumLetEx | $Single_QuoteEx) ($ALetterEx | $Hebrew_LetterEx) {200}; 137 138# rule 7a 139$Hebrew_LetterEx $Single_QuoteEx {200}; 140 141# rule 7b and 7c 142$Hebrew_LetterEx $Double_QuoteEx $Hebrew_LetterEx {200}; 143 144# rule 8 145 146$NumericEx $NumericEx {100}; 147 148# rule 9 149 150($ALetterEx | $Hebrew_LetterEx) $NumericEx {200}; 151 152# rule 10 153 154$NumericEx ($ALetterEx | $Hebrew_LetterEx) {200}; 155 156# rule 11 and 12 157 158$NumericEx ($MidNumEx | $MidNumLetEx | $Single_QuoteEx) $NumericEx {100}; 159 160# rule 13 161# to be consistent with $KanaKanji $KanaKanhi, changed 162# from 300 to 400. 163# See also TestRuleStatus in intltest/rbbiapts.cpp 164$KatakanaEx $KatakanaEx {400}; 165 166# rule 13a/b 167 168$ALetterEx $ExtendNumLetEx {200}; # (13a) 169$Hebrew_LetterEx $ExtendNumLetEx {200}; # (13a) 170$NumericEx $ExtendNumLetEx {100}; # (13a) 171$KatakanaEx $ExtendNumLetEx {400}; # (13a) 172$ExtendNumLetEx $ExtendNumLetEx {200}; # (13a) 173 174$ExtendNumLetEx $ALetterEx {200}; # (13b) 175$ExtendNumLetEx $Hebrew_Letter {200}; # (13b) 176$ExtendNumLetEx $NumericEx {100}; # (13b) 177$ExtendNumLetEx $KatakanaEx {400}; # (13b) 178 179# rule 14 180# Do not break within emoji modifier sequences 181 182($E_Base | $EBG) ($Format | $Extend | $ZWJ)* $E_Modifier; 183 184# rules 15 - 17 185# Pairs of Regional Indicators stay together. 186# With rule chaining disabled by ^, this rule will match exactly two of them. 187# No other rule begins with a Regional_Indicator, so chaining cannot extend the match. 188# 189^$Regional_IndicatorEx $Regional_IndicatorEx; 190 191# special handling for CJK characters: chain for later dictionary segmentation 192$HangulSyllable $HangulSyllable {200}; 193$KanaKanji $KanaKanji {400}; # different rule status if both kana and kanji found 194 195 196## ------------------------------------------------- 197 198!!reverse; 199 200$BackHebrew_LetterEx = ($Format | $Extend | $ZWJ)* $Hebrew_Letter; 201$BackALetterEx = ($Format | $Extend | $ZWJ)* $ALetterPlus; 202$BackSingle_QuoteEx = ($Format | $Extend | $ZWJ)* $Single_Quote; 203$BackDouble_QuoteEx = ($Format | $Extend | $ZWJ)* $Double_Quote; 204$BackMidNumLetEx = ($Format | $Extend | $ZWJ)* $MidNumLet; 205$BackNumericEx = ($Format | $Extend | $ZWJ)* $Numeric; 206$BackMidNumEx = ($Format | $Extend | $ZWJ)* $MidNum; 207$BackMidLetterEx = ($Format | $Extend | $ZWJ)* $MidLetter; 208$BackKatakanaEx = ($Format | $Extend | $ZWJ)* $Katakana; 209$BackHiraganaEx = ($Format | $Extend | $ZWJ)* $Hiragana; 210$BackExtendNumLetEx = ($Format | $Extend | $ZWJ)* $ExtendNumLet; 211$BackRegional_IndicatorEx = ($Format | $Extend | $ZWJ)* $Regional_Indicator; 212 213# rule 3 214$LF $CR; 215 216# Rule 3c ZWJ x (Extended_Pict | EmojiNRK). Precedes WB4, so no intervening Extend chars allowed. 217# 218($Extended_Pict | $EmojiNRK) $ZWJ; 219 220# rule 4 221($Format | $Extend | $ZWJ)* [^$CR $LF $Newline]?; 222 223# rule 5 224 225($BackALetterEx | $BackHebrew_LetterEx) ($BackALetterEx | $BackHebrew_LetterEx); 226 227# rule 6 and 7 228 229($BackALetterEx | $BackHebrew_LetterEx) ($BackMidLetterEx | $BackMidNumLetEx | $BackSingle_QuoteEx) ($BackALetterEx | $BackHebrew_LetterEx); 230 231# rule 7a 232$BackSingle_QuoteEx $BackHebrew_LetterEx; 233 234# Rule 7b and 7c 235$BackHebrew_LetterEx $BackDouble_QuoteEx $BackHebrew_LetterEx; 236 237# rule 8 238 239$BackNumericEx $BackNumericEx; 240 241# rule 9 242 243$BackNumericEx ($BackALetterEx | $BackHebrew_LetterEx); 244 245# rule 10 246 247($BackALetterEx | $BackHebrew_LetterEx) $BackNumericEx; 248 249# rule 11 and 12 250 251$BackNumericEx ($BackMidNumEx | $BackMidNumLetEx | $BackSingle_QuoteEx) $BackNumericEx; 252 253# rule 13 254 255$BackKatakanaEx $BackKatakanaEx; 256 257# rules 13 a/b 258# 259$BackExtendNumLetEx ($BackALetterEx | $BackHebrew_LetterEx | $BackNumericEx | $BackKatakanaEx | $BackExtendNumLetEx); 260($BackALetterEx | $BackHebrew_LetterEx | $BackNumericEx | $BackKatakanaEx) $BackExtendNumLetEx; 261 262# special handling for CJK characters: chain for later dictionary segmentation 263$HangulSyllable $HangulSyllable; 264$KanaKanji $KanaKanji; #different rule status if both kanji and kana found 265 266# rule 14 267 268$E_Modifier ($Format | $Extend | $ZWJ)* ($E_Base | $EBG); 269 270# rule 15 - 17 271# Pairs of Regional Indicators stay together. 272 273^$BackRegional_IndicatorEx / ($BackRegional_IndicatorEx $BackRegional_IndicatorEx)* 274 ($Format | $Extend | $ZWJ)* [[^$Regional_Indicator $Format $Extend $ZWJ] {eof}]; 275^$BackRegional_IndicatorEx $BackRegional_IndicatorEx / ($BackRegional_IndicatorEx $BackRegional_IndicatorEx)* 276 ($Format | $Extend | $ZWJ)* [[^$Regional_Indicator $Format $Extend $ZWJ] {eof}]; 277 278($Extended_Pict | $EmojiNRK) $ZWJ $BackRegional_IndicatorEx / ($BackRegional_IndicatorEx $BackRegional_IndicatorEx)* 279 ($Format | $Extend | $ZWJ)* [[^$Regional_Indicator $Format $Extend $ZWJ] {eof}]; 280($Extended_Pict | $EmojiNRK) $ZWJ $BackRegional_IndicatorEx $BackRegional_IndicatorEx / ($BackRegional_IndicatorEx $BackRegional_IndicatorEx)* 281 ($Format | $Extend | $ZWJ)* [[^$Regional_Indicator $Format $Extend $ZWJ] {eof}]; 282 283 284 285## ------------------------------------------------- 286 287!!safe_reverse; 288 289# rule 3 290($Extend | $Format | $ZWJ)+ .?; 291 292# rule 6 293($MidLetter | $MidNumLet | $Single_Quote) ($BackALetterEx | $BackHebrew_LetterEx); 294 295# rule 7b 296$Double_Quote $BackHebrew_LetterEx; 297 298 299# rule 11 300($MidNum | $MidNumLet | $Single_Quote) $BackNumericEx; 301 302# rule 13c 303$BackRegional_IndicatorEx*; 304 305# For dictionary-based break 306$dictionary $dictionary; 307 308## ------------------------------------------------- 309 310!!safe_forward; 311 312# rule 4 313($Extend | $Format | $ZWJ)+ .?; 314 315# rule 6 316($MidLetterEx | $MidNumLetEx | $Single_QuoteEx) ($ALetterEx | $Hebrew_LetterEx); 317 318# rule 7b 319$Double_QuoteEx $Hebrew_LetterEx; 320 321# rule 11 322($MidNumEx | $MidNumLetEx | $Single_QuoteEx) $NumericEx; 323 324# rule 13c 325$Regional_IndicatorEx*; 326 327# For dictionary-based break 328$dictionary $dictionary; 329