This file is indexed.

/usr/share/link-grammar/en/4.0.regex is in link-grammar-dictionaries-en 4.7.4-2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
 %***************************************************************************%
 %                                                                           %
 %  Copyright (C) 2005, 2006 Sampo Pyysalo, Sophie Aubin                     %
 %  See file "LICENSE" for information about commercial use of this system   %
 %                                                                           %
 %***************************************************************************%

% This file contains regular expressions that are used to match
% tokens not found in the dictionary. Each regex is given a name which
% determines the disjuncts assigned when the regex matches; this name
% must be defined in the dictionary along with the appropriate disjuncts.
% Note that the order of the regular expressions matters: matches will
% be attempted in the order in which the regexs appear in this file,
% and only the first match will be used.

% Numbers.
% XXX, we need to add utf8 U+00A0 "no-break space"
% 
% Allows at most two colons in hour-muinute-second HH:MM:SS expressions
% Allows at most two digits between colons
HMS-TIME: /^[0-9][0-9]?(:[0-9][0-9]?(:[0-9][0-9]?)?)?(AM|PM|am|pm)?$/

% e.g. 1950's leading number can be higher, for science fiction.
% Must be four digits, or possible three. Must end in s, 's ’s
DECADE-TIME: /^([1-4][0-9][0-9]|[1-9][0-9])0(s|'s|’s)$/

% Day-of-month names; this regex will match before the one below.
DAY-ORDINALS: /^(1st|2nd|3rd|[4-9]th|1[0-9]th|2(0th|1st|2nd|3rd|[4-9]th)|30th|31st)$/

% Ordinal numbers; everything except 1st through 13th
% is handled by regex.
ORDINALS: /^[1-9][0-9]*(0th|1st|2nd|3rd|[4-9]th)$/

% Allows any number of commas or periods
% Be careful not match the period at the end of a sentence; 
% for example: "It happened in 1942."
NUMBERS: /^[0-9,.]*[0-9]$/
% This parses signed numbers and ranges, e.g. "-5" and "5-10" and "9+/-6.5"
NUMBERS: /^[0-9.,-]*[0-9](\+\/-[0-9.,-]*[0-9])?$/
% Parses simple fractions e.g. "1/60" with no decimal points or anything fancy
FRACTION: /^[0-9]+\/[0-9]+$/
% "10(3)" exponent (used in PubMed)
NUMBERS: /^[0-9.,-]*[0-9][0-9.,-]*\([0-9:.,-]*[0-9][0-9.,-]*\)$/

% Roman numerals
% The first expr has the potential(?) problem that it matches an empty
% string. Thus, the next three rules specify that at least one section
% is non-empty.
ROMAN-NUMERAL-WORDS: /^M*(CM|D?C{0,3}|CD)(XC|L?X{0,3}|XL)(IX|V?I{0,3}|IV)$/
% ROMAN-NUMERAL-WORDS: /^M*(CM|D?C{0,3}|CD){1}(XC|L?X{0,3}|XL)(IX|V?I{0,3}|IV)$/
% ROMAN-NUMERAL-WORDS: /^M*(CM|D?C{0,3}|CD)(XC|L?X{0,3}|XL){1}(IX|V?I{0,3}|IV)$/
% ROMAN-NUMERAL-WORDS: /^M*(CM|D?C{0,3}|CD)(XC|L?X{0,3}|XL)(IX|V?I{0,3}|IV){1}$/

% Strings of initials. e.g "Dr. J.G.D. Smith lives on Main St."
INITIALS: /^([A-Z]\.)+$/

% Greek letters with numbers
GREEK-LETTER-AND-NUMBER: /^(alpha|beta|gamma|delta|epsilon|zeta|eta|theta|iota|kappa|lambda|mu|nu|xi|omicron|pi|rho|sigma|tau|upsilon|phi|chi|psi|omega)\-?[0-9]+$/
PL-GREEK-LETTER-AND-NUMBER: /^(alpha|beta|gamma|delta|epsilon|zeta|eta|theta|iota|kappa|lambda|mu|nu|xi|omicron|pi|rho|sigma|tau|upsilon|phi|chi|psi|omega)s\-?[0-9]+$/

% Some "safe" derived units. Simple units are in dictionary.
% The idea here is for the regex to match something that is almost
% certainly part of a derived unit, and allow the rest to be
% anything; this way we can capture difficult derived units such
% as "mg/kg/day" and even oddities such as "micrograms/mouse/day"
% without listing them explicitly.
% TODO: add more. 
% Some (real) misses from these: 
% micrograms.kg-1.h-1 microM-1 J/cm2 %/day mN/m cm/yr
% m/s days/week ml/s degrees/sec cm/sec cm/s mm/s N/mm (is that a unit?)
% cuts/minute clicks/s beats/minute x/week W/kg/W %/patient-year
% microIU/ml degrees/s counts/mm2 cells/mm3 tumors/mouse
% mm/sec ml/hr mJ/cm(2) m2/g amol/mm2 animals/group
% h-1 min-1 day-1 cm-1 mg-1 kg-1 mg.m-2.min-1 ms.cm-1 g-1
% sec-1 ms-1 ml.min.-1kg-1 ml.hr-1
% also, both kilometer and kilometers seem to be absent(!)
% remember "mm"!

UNITS: /^([npmk]|nano|pico|milli|micro|kilo)?(g|grams?)\//   % grams/anything
UNITS: /^([fnmp]|femto|nano|micro|pico|mu)?mol(es)?\//       % mol/anything
UNITS: /^[a-zA-Z\/.]+\/((m|micro)?[lLg]|kg|mol|min|day|h)$/  % common endings
% common endings, except in the style "mg.kg-1" instead of "mg/kg".
UNITS: /^[a-zA-Z\/.1-]+\.((m|micro)?[lLg]|kg|mol|min|day|h)(-1|\(-1\))$/

% combinations of numbers and units, e.g. "50-kDa", "1-2h"
% TODO: Clean up and check that these are up-to-date wrt the 
% dictionary-recognized units; this is quite a mess currently.
% TODO: Extend the "number" part of the regex to allow anything
% that the NUMBER regex matches.
% One problem here is a failure to split up the expression ... 
% e.g. "2hr" becomes 2 - ND - hr with the ND link. But 2-hr is treated
% as a single word ('I is a 2-hr wait')
% NUMBER-AND-UNIT: /^[0-9.,-]+(msec|s|min|hour|h|hr|day|week|wk|month|year|yr|kDa|kilodalton|base|kilobase|base-pair|kD|kd|kDa|bp|nt|kb|mm|mg|cm|nm|g|Hz|ms|kg|ml|mL|km|microm|\%)$/
% Comment out above, it screws up handling of unit suffixes, for
% example: "Zangbert stock fell 30% to $2.50 yesterday."


% fold-words. Matches NUMBER-fold, where NUMBER can be either numeric
% or a spelled-out number, and the hyphen is optional. Note that for
% spelled-out numbers, anything is allowed between the "initial" number
% and "fold" to catch e.g. "two-to-three fold" ("fourteen" etc. are absent
% as the prefix "four" is sufficient to match).
FOLD-WORDS: /^[0-9.,:-]*[0-9]([0-9.,:-]|\([0-9.,:-]*[0-9][0-9.,:-]*\)|\+\/-)*-?fold$/
FOLD-WORDS: /^(one|two|three|four|five|six|seven|eight|nine|ten|eleven|twelve|thirteen|fifteen|twenty|thirty|fifty|hundred|thousand|million).*fold$/

% Plural proper nouns.
% Make sure that apostrophe-s is split out correctly.
PL-CAPITALIZED-WORDS:  /^[[:upper:]].*[^iuoys'’]s$/

% Other proper nouns.
% We demand that these end with an alphanumeric, i.e. explicitly
% reject punctuation. We don't want this regex to "swallow" any trailing
% commas, colons, or periods/question-marks at the end of sentences.
% In addition, this must not swallow words ending in 's 'll etc.
% (... any affix, for that matter ...) and so no embedded apostrophe
CAPITALIZED-WORDS:     /^[[:upper:]][^'’]*[^[:punct:]]$/

% SUFFIX GUESSING
% For all suffix-guessing patterns, we insist that the pattern start
% with an alphanumeric. This is needed to guarentee that the
% prefix-stripping code works correctly, as otherwise, the regex will
% gobble the prefix. So for example: "We left (carrying the dog) and
% Fred followed."  Since "(carrying" is not in the dict, we need to be
% sure to not match the leading paren so that it will get tripped.
%
ING-WORDS:        /^\w.+ing$/

% Plurals or verb-s. Make sure that apostrophe-s is split out correctly.
% e.g. "The subject's name is John Doe."  should be
%     +--Ds--+---YS--+--Ds-+
%     |      |       |     |
%    the subject.n 's.p name.n 
S-WORDS:          /^\w.+[^iuoys'’]s$/

% Verbs ending -ed.
ED-WORDS:         /^\w.+ed$/

% Advebs ending -ly.
LY-WORDS:         /^\w.+ly$/

% Nouns ending in -ism, -asm (chiliasm .. ) Usualy mass nouns
% Stubbed out for now; I'm not convinced this improves accuracy.
% ISM-WORDS:        /^\w.+asm$/
% ISM-WORDS:        /^\w.+ism$/

% Corresponding count noun version of above (chiliast...)
% AST-WORDS:        /^\w.+ast$/
% AST-WORDS:        /^\w.+ist$/

% Corresponding adjectival form of above
ADJ-WORDS: /^\w.+astic$/
ADJ-WORDS: /^\w.+istic$/

% Nouns ending -ation  stubbed out in BioLG, stub out here ... 
%ATION-WORDS:      /^\w.+ation$/

% Extension by LIPN 11/10/2005
% nouns -- typically seen in (bio-)chemistry texts
% synthetase, kinase
% 5-(hydroxymethyl)-2’-deoxyuridine
% hydroxyethyl, hydroxymethyl
% septation, reguion
% isomaltotetraose, isomaltotriose
% glycosylphosphatidylinositol
% iodide, oligodeoxynucleotide
% chronicity, hypochromicity
MC-NOUN-WORDS: /^\w.+ase$/
MC-NOUN-WORDS: /^\w.+ine?$/
MC-NOUN-WORDS: /^\w.+yl$/
MC-NOUN-WORDS: /^\w.+ion$/
MC-NOUN-WORDS: /^\w.+ose$/
MC-NOUN-WORDS: /^\w.+ol$/
MC-NOUN-WORDS: /^\w.+ide$/
MC-NOUN-WORDS: /^\w.+ity$/

% replicon, intron
C-NOUN-WORDS: /^\w.+o[rn]$/

% adjectives
% exogenous, heterologous
% intermolecular, intramolecular
% glycolytic, ribonucleic, uronic
% ribosomal, ribsosomal
% nonpermissive, thermosensitive
% inducible, metastable
ADJ-WORDS: /^\w.+ous$/
ADJ-WORDS: /^\w.+ar$/
ADJ-WORDS: /^\w.+ic$/
ADJ-WORDS: /^\w.+al$/
ADJ-WORDS: /^\w.+ive$/
ADJ-WORDS: /^\w.+ble$/

% latin (postposed) adjectives
% influenzae, tarentolae
% pentosaceus, luteus, carnosus
LATIN-ADJ-WORDS: /^\w.+ae$/
LATIN-ADJ-WORDS: /^\w.+us$/ % must appear after -ous in this file

% latin (postposed) adjectives  or latin plural noun
% brevis, israelensis
% japonicum, tabacum, xylinum
LATIN-ADJ-P-NOUN-WORDS: /^\w.+is?$/
LATIN-ADJ-S-NOUN-WORDS: /^\w.+um$/


% Hyphenated words. In the original LG morpho-guessing system that
% predated the regex-based system, hyphenated words were detected
% before ING-WORDS, S-WORDS etc., causing e.g. "cross-linked" to be
% treated as a HYPHENATED-WORD (a generic adjective/noun), and
% never a verb. To return to this ordering, move this regex just
% after the CAPITALIZED-WORDS regex.
HYPHENATED-WORDS: /^[[:alpha:][:digit:],.][[:alpha:][:digit:],.-]*-[[:alpha:][:digit:],.-]*[[:alpha:][:digit:],.]$/

% proteins often end "ase", so we'll assume those things are names.
% removed, too many false positives.
% NAME: /ase$/

% Sequence of punctuation marks. If some mark appears in the affix table
% such as a period, comma, dash or underscore, and there's a sequence of
% these, then treat it as a "fill-in-the-blank" placeholder.
% This matters only for punc. appearing in the affix table, since the
% tokenizer explicitly mangles based on these punctution marks.
% 
% Look for at least four in a row.
UNKNOWN-WORD: /^[.,-]{4}[.,-]*$/