1#
2#   Copyright (C) 2002-2003, International Business Machines Corporation and others.
3#       All Rights Reserved.
4#
5#   file:  dict_word.txt
6#
7#   ICU Word Break Rules
8#      See Unicode Standard Annex #29.
9#      These rules are based on Version 4.0.0, dated 2003-04-17
10#
11
12
13
14####################################################################################
15#
16#  Character class definitions from TR 29
17#
18####################################################################################
19$Katakana  = [[:Script = KATAKANA:] [:name = KATAKANA-HIRAGANA PROLONGED SOUND MARK:]
20                                   [:name = HALFWIDTH KATAKANA-HIRAGANA PROLONGED SOUND MARK:]
21                                   [:name = HALFWIDTH KATAKANA VOICED SOUND MARK:]
22                                   [:name = HALFWIDTH KATAKANA SEMI-VOICED SOUND MARK:]];
23
24$Ideographic = [:Ideographic:];
25$Hangul = [:Script = HANGUL:];
26
27$ALetter   = [\u0002 [:Alphabetic:] [:name= COMMERCIAL AT:] [:name= HEBREW PUNCTUATION GERESH:]
28                [:name = PERCENT SIGN:] [:name = PER MILLE SIGN:] [:name = PER TEN THOUSAND SIGN:]
29                [:name = SECTION SIGN:] [:name = DEGREE SIGN:] [:name = EURO SIGN:]
30                [:name = HYPHEN-MINUS:] [:name = EN DASH:] [:name = EM DASH:]
31                [:name = DIGIT ZERO:]
32                [:name = DIGIT ONE:]
33                [:name = DIGIT TWO:]
34                [:name = DIGIT THREE:]
35                [:name = DIGIT FOUR:]
36                [:name = DIGIT FIVE:]
37                [:name = DIGIT SIX:]
38                [:name = DIGIT SEVEN:]
39                [:name = DIGIT EIGHT:]
40                [:name = DIGIT NINE:]
41                           - $Ideographic
42                           - $Katakana
43                           - $Hangul
44                           - [:Script = Thai:]
45                           - [:Script = Lao:]
46                           - [:Script = Hiragana:]];
47
48$MidLetter = [[:name = APOSTROPHE:] [:name = GRAVE ACCENT:] \u0084 [:name = SOFT HYPHEN:] [:name = MIDDLE DOT:] [:name = GREEK TONOS:]
49              [:name = HEBREW PUNCTUATION GERSHAYIM:] [:name = DOUBLE VERTICAL LINE:] [:name = LEFT SINGLE QUOTATION MARK:]
50              [:name = RIGHT SINGLE QUOTATION MARK:] [:name = HYPHENATION POINT:] [:name = PRIME:] [:name = HYPHEN-MINUS:]
51              [:name = EURO SIGN:] [:name = PERCENT SIGN:] [:name = PER MILLE SIGN:] [:name = PER TEN THOUSAND SIGN:]
52              [:name = EN DASH:] [:name = EM DASH:]
53              [:name = FULL STOP:] [:name = PERCENT SIGN:] [:name = SECTION SIGN:] [:name = DEGREE SIGN:]];
54
55$SufixLetter = [:name= FULL STOP:];
56
57$MidNum    = [[:LineBreak = Infix_Numeric:] [:name= COMMERCIAL AT:] \u0084 [:name = GREEK TONOS:] [:name = ARABIC DECIMAL SEPARATOR:]
58             [:name = LEFT SINGLE QUOTATION MARK:] [:name = RIGHT SINGLE QUOTATION MARK:] [:name = SINGLE HIGH-REVERSED-9 QUOTATION MARK:]
59             [:name = PRIME:]];
60$Numeric   = [:LineBreak = Numeric:];
61
62
63$TheZWSP = \u200b;
64
65#
66#  Character Class Definitions.
67#    The names are those from TR29.
68#
69$CR         = \u000d;
70$LF         = \u000a;
71$Control    = [[[:Zl:] [:Zp:] [:Cc:] [:Cf:]] - $TheZWSP];
72$Extend     = [[:Grapheme_Extend = TRUE:]];
73
74
75
76
77####################################################################################
78#
79#  Word Break Rules.    Definitions and Rules specific to word break begin Here.
80#
81####################################################################################
82
83$Format    = [[:Cf:] - $TheZWSP];
84
85
86
87# Rule 3:  Treat a grapheme cluster as if it were a single character.
88#          Hangul Syllables are easier to deal with here than they are in Grapheme Clusters
89#          because we don't need to find the boundaries between adjacent syllables -
90#          they won't be word boundaries.
91#
92
93
94#
95#  "Extended"  definitions.  Grapheme Cluster + Format Chars, treated like the base char.
96#
97$ALetterEx    = $ALetter   $Extend*;
98$NumericEx    = $Numeric   $Extend*;
99$MidNumEx     = $MidNum    $Extend*;
100$MidLetterEx  = $MidLetter $Extend*;
101$SufixLetterEx= $SufixLetter $Extend*;
102$KatakanaEx   = $Katakana  $Extend*;
103$IdeographicEx= $Ideographic  $Extend*;
104$HangulEx = $Hangul  $Extend*;
105$FormatEx     = $Format    $Extend*;
106
107
108#
109#  Numbers.  Rules 8, 11, 12 form the TR.
110#
111$NumberSequence = $NumericEx ($FormatEx* $MidNumEx? $FormatEx* $NumericEx)*;
112$NumberSequence {100};
113
114#
115#  Words.  Alpha-numerics.  Rule 5, 6, 7, 9, 10
116#     - must include at least one letter.
117#     - may include both letters and numbers.
118#     - may include  MideLetter, MidNumber punctuation.
119#
120$LetterSequence = $ALetterEx ($FormatEx* $MidLetterEx? $FormatEx* $ALetterEx)*;     # rules #6, #7
121($NumberSequence $FormatEx*)? $LetterSequence ($FormatEx* ($NumberSequence | $LetterSequence))* $SufixLetterEx? {200};
122
123[[:P:][:S:]]*;
124
125#
126#  Do not break between Katakana.   Rule #13.
127#
128$KatakanaEx ($FormatEx* $KatakanaEx)* {300};
129[:Hiragana:] $Extend* {300};
130
131#
132#  Ideographic Characters.  Stand by themselves as words.
133#                           Separated from the "Everything Else" rule, below, only so that they
134#                           can be tagged with a return value.   TODO:  is this what we want?
135#
136$IdeographicEx ($FormatEx* $IdeographicEx)* {400};
137$HangulEx ($FormatEx* $HangulEx)* {400};
138
139#
140#  Everything Else, with no tag.
141#                   Non-Control chars combine with $Extend (combining) chars.
142#                   Controls are do not.
143#
144[^$Control [:Ideographic:]] $Extend*;
145$CR $LF;
146
147#
148#  Reverse Rules.   Back up over any of the chars that can group together.
149#                   (Reverse rules do not need to be exact; they can back up  too far,
150#                   but must back up at least enough, and must stop on a boundary.)
151#
152
153# NonStarters are the set of all characters that can appear at the 2nd - nth position of
154#    a word.   (They may also be the first.)   The reverse rule skips over these, until it
155#    reaches something that can only be the start (and probably only) char in a "word".
156#    A space or punctuation meets the test.
157#
158$NonStarters = [$Numeric $ALetter $Katakana $Ideographic $Hangul [:P:] [:S:] $MidLetter $MidNum $SufixLetter $Extend $Format];
159
160#!.*;
161! ($NonStarters* | \n \r) .;
162
163