1 # Copyright (C) 2016 and later: Unicode, Inc. and others. 2 # License & terms of use: http://www.unicode.org/copyright.html 3 # 4 # Copyright (C) 2002-2015, International Business Machines Corporation and others. 5 # All Rights Reserved. 6 # 7 # file: sent.txt 8 # 9 # ICU Sentence Break Rules 10 # See Unicode Standard Annex #29. 11 # These rules are based on UAX #29 Revision 26 for Unicode Version 8.0 12 # 13 14 !!quoted_literals_only; 15 16 # 17 # Character categories as defined in TR 29 18 # 19 $CR = [\p{Sentence_Break = CR}]; 20 $LF = [\p{Sentence_Break = LF}]; 21 $Extend = [\p{Sentence_Break = Extend}]; 22 $Sep = [\p{Sentence_Break = Sep}]; 23 $Format = [\p{Sentence_Break = Format}]; 24 $Sp = [\p{Sentence_Break = Sp}]; 25 $Lower = [\p{Sentence_Break = Lower}]; 26 $Upper = [\p{Sentence_Break = Upper}]; 27 $OLetter = [\p{Sentence_Break = OLetter}]; 28 $Numeric = [\p{Sentence_Break = Numeric}]; 29 $ATerm = [\p{Sentence_Break = ATerm}]; 30 $SContinue = [\p{Sentence_Break = SContinue}]; 31 $STerm = [\p{Sentence_Break = STerm}]; 32 $Close = [\p{Sentence_Break = Close}]; 33 34 # 35 # Define extended forms of the character classes, 36 # incorporate trailing Extend or Format chars. 37 # Rules 4 and 5. 38 39 $SpEx = $Sp ($Extend | $Format)*; 40 $LowerEx = $Lower ($Extend | $Format)*; 41 $UpperEx = $Upper ($Extend | $Format)*; 42 $OLetterEx = $OLetter ($Extend | $Format)*; 43 $NumericEx = $Numeric ($Extend | $Format)*; 44 $ATermEx = $ATerm ($Extend | $Format)*; 45 $SContinueEx= $SContinue ($Extend | $Format)*; 46 $STermEx = $STerm ($Extend | $Format)*; 47 $CloseEx = $Close ($Extend | $Format)*; 48 49 50 ## ------------------------------------------------- 51 52 !!chain; 53 54 # Rule 3 - break after separators. Keep CR/LF together. 55 # 56 $CR $LF; 57 58 59 # Rule 4 - Break after $Sep. 60 # Rule 5 - Ignore $Format and $Extend 61 # 62 [^$Sep $CR $LF]? ($Extend | $Format)*; 63 64 65 # Rule 6 66 $ATermEx $NumericEx; 67 68 # Rule 7 69 ($UpperEx | $LowerEx) $ATermEx $UpperEx; 70 71 #Rule 8 72 $NotLettersEx = [^$OLetter $Upper $Lower $Sep $CR $LF $ATerm $STerm] ($Extend | $Format)*; 73 $ATermEx $CloseEx* $SpEx* $NotLettersEx* $Lower; 74 75 # Rule 8a 76 ($STermEx | $ATermEx) $CloseEx* $SpEx* ($SContinueEx | $STermEx | $ATermEx); 77 78 #Rule 9, 10, 11 79 ($STermEx | $ATermEx) $CloseEx* $SpEx* ($Sep | $CR | $LF)?; 80 81 #Rule 12 82 [[^$STerm $ATerm $Close $Sp $Sep $LF $CR $Format $Extend]{bof}] ($Extend | $Format | $Close | $Sp)* .; 83 [[^$STerm $ATerm $Close $Sp $Sep $LF $CR $Format $Extend]{bof}] ($Extend | $Format | $Close | $Sp)* ([$Sep $LF $CR {eof}] | $CR $LF){100}; 84
