1# Copyright (C) 2016 and later: Unicode, Inc. and others. 2# License & terms of use: http://www.unicode.org/copyright.html 3# 4# 5# Copyright (C) 2002-2015, International Business Machines Corporation and others. 6# All Rights Reserved. 7# 8# file: sent_el.txt 9# 10# ICU Sentence Break Rules 11# See Unicode Standard Annex #29. 12# These rules are based on UAX #29 Revision 26 for Unicode Version 8.0 13# 14 15!!quoted_literals_only; 16 17# 18# Character categories as defined in TR 29 19# 20$CR = [\p{Sentence_Break = CR}]; 21$LF = [\p{Sentence_Break = LF}]; 22$Extend = [\p{Sentence_Break = Extend}]; 23$Sep = [\p{Sentence_Break = Sep}]; 24$Format = [\p{Sentence_Break = Format}]; 25$Sp = [\p{Sentence_Break = Sp}]; 26$Lower = [\p{Sentence_Break = Lower}]; 27$Upper = [\p{Sentence_Break = Upper}]; 28$OLetter = [\p{Sentence_Break = OLetter}]; 29$Numeric = [\p{Sentence_Break = Numeric}]; 30$ATerm = [\p{Sentence_Break = ATerm}]; 31$SContinue = [\p{Sentence_Break = SContinue}]; 32$STerm = [\p{Sentence_Break = STerm} [\u003B \u037E]]; 33$Close = [\p{Sentence_Break = Close}]; 34 35# 36# Define extended forms of the character classes, 37# incorporate trailing Extend or Format chars. 38# Rules 4 and 5. 39 40$SpEx = $Sp ($Extend | $Format)*; 41$LowerEx = $Lower ($Extend | $Format)*; 42$UpperEx = $Upper ($Extend | $Format)*; 43$OLetterEx = $OLetter ($Extend | $Format)*; 44$NumericEx = $Numeric ($Extend | $Format)*; 45$ATermEx = $ATerm ($Extend | $Format)*; 46$SContinueEx= $SContinue ($Extend | $Format)*; 47$STermEx = $STerm ($Extend | $Format)*; 48$CloseEx = $Close ($Extend | $Format)*; 49 50 51## ------------------------------------------------- 52 53!!chain; 54 55# Rule 3 - break after separators. Keep CR/LF together. 56# 57$CR $LF; 58 59 60# Rule 4 - Break after $Sep. 61# Rule 5 - Ignore $Format and $Extend 62# 63[^$Sep $CR $LF]? ($Extend | $Format)*; 64 65 66# Rule 6 67$ATermEx $NumericEx; 68 69# Rule 7 70($UpperEx | $LowerEx) $ATermEx $UpperEx; 71 72#Rule 8 73$NotLettersEx = [^$OLetter $Upper $Lower $Sep $CR $LF $ATerm $STerm] ($Extend | $Format)*; 74$ATermEx $CloseEx* $SpEx* $NotLettersEx* $Lower; 75 76# Rule 8a 77($STermEx | $ATermEx) $CloseEx* $SpEx* ($SContinueEx | $STermEx | $ATermEx); 78 79#Rule 9, 10, 11 80($STermEx | $ATermEx) $CloseEx* $SpEx* ($Sep | $CR | $LF)?; 81 82#Rule 12 83[[^$STerm $ATerm $Close $Sp $Sep $LF $CR $Format $Extend]{bof}] ($Extend | $Format | $Close | $Sp)* .; 84[[^$STerm $ATerm $Close $Sp $Sep $LF $CR $Format $Extend]{bof}] ($Extend | $Format | $Close | $Sp)* ([$Sep $LF $CR {eof}] | $CR $LF){100}; 85