1 | ###########################################################################
|
---|
2 | #
|
---|
3 | # Phind.pm -- the Phind classifier
|
---|
4 | #
|
---|
5 | # Copyright (C) 2000 Gordon W. Paynter
|
---|
6 | # Copyright (C) 2000 New Zealand Digital Library Project
|
---|
7 | #
|
---|
8 | #
|
---|
9 | # A component of the Greenstone digital library software
|
---|
10 | # from the New Zealand Digital Library Project at the
|
---|
11 | # University of Waikato, New Zealand.
|
---|
12 | #
|
---|
13 | # This program is free software; you can redistribute it and/or modify
|
---|
14 | # it under the terms of the GNU General Public License as published by
|
---|
15 | # the Free Software Foundation; either version 2 of the License, or
|
---|
16 | # (at your option) any later version.
|
---|
17 | #
|
---|
18 | # This program is distributed in the hope that it will be useful,
|
---|
19 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
20 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
21 | # GNU General Public License for more details.
|
---|
22 | #
|
---|
23 | # You should have received a copy of the GNU General Public License
|
---|
24 | # along with this program; if not, write to the Free Software
|
---|
25 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
---|
26 | #
|
---|
27 | ###########################################################################
|
---|
28 |
|
---|
29 | # The Phind clasifier plugin.
|
---|
30 | # Type "classinfo.pl Phind" at the command line for a summary.
|
---|
31 |
|
---|
32 | # 12/05/02 Added usage datastructure - John Thompson
|
---|
33 |
|
---|
34 | package Phind;
|
---|
35 |
|
---|
36 | use BaseClassifier;
|
---|
37 | use util;
|
---|
38 | use ghtml;
|
---|
39 | use unicode;
|
---|
40 |
|
---|
41 | use strict;
|
---|
42 | no strict 'refs'; # allow filehandles to be variables and viceversa
|
---|
43 |
|
---|
44 | my @removedirs = ();
|
---|
45 |
|
---|
46 | my %wanted_index_files = ('td'=>1,
|
---|
47 | 't'=>1,
|
---|
48 | 'ti'=>1,
|
---|
49 | 'tl'=>1,
|
---|
50 | 'tsd'=>1,
|
---|
51 | 'idb'=>1,
|
---|
52 | 'ib1'=>1,
|
---|
53 | 'ib2'=>1,
|
---|
54 | 'ib3'=>1,
|
---|
55 | 'i'=>1,
|
---|
56 | 'il'=>1,
|
---|
57 | 'w'=>1,
|
---|
58 | 'wa'=>1);
|
---|
59 |
|
---|
60 | sub BEGIN {
|
---|
61 | @Phind::ISA = ('BaseClassifier');
|
---|
62 | }
|
---|
63 |
|
---|
64 | sub END {
|
---|
65 |
|
---|
66 | # Tidy up stray files - we do this here as there's some weird problem
|
---|
67 | # preventing us from doing it in the get_classify_info() function (on
|
---|
68 | # windows at least) where the close() appears to fail on txthandle and
|
---|
69 | # dochandle, thus preventing us from deleting those files
|
---|
70 |
|
---|
71 | foreach my $dir (@removedirs) {
|
---|
72 | if (-d $dir && opendir (DIR, $dir)) {
|
---|
73 | my @files = readdir DIR;
|
---|
74 | closedir DIR;
|
---|
75 |
|
---|
76 | foreach my $file (@files) {
|
---|
77 | next if $file =~ /^\.\.?$/;
|
---|
78 | my ($suffix) = $file =~ /\.([^\.]+)$/;
|
---|
79 | if (!defined $suffix || !defined $wanted_index_files{$suffix}) {
|
---|
80 | # delete it!
|
---|
81 | &util::rm (&util::filename_cat ($dir, $file));
|
---|
82 | }
|
---|
83 | }
|
---|
84 | }
|
---|
85 | }
|
---|
86 | }
|
---|
87 |
|
---|
88 | my $arguments =
|
---|
89 | [ { 'name' => "text",
|
---|
90 | 'desc' => "{Phind.text}",
|
---|
91 | 'type' => "string",
|
---|
92 | 'deft' => "section:Title,section:text",
|
---|
93 | 'reqd' => "no" },
|
---|
94 | { 'name' => "title",
|
---|
95 | 'desc' => "{Phind.title}",
|
---|
96 | 'type' => "metadata",
|
---|
97 | 'deft' => "Title",
|
---|
98 | 'reqd' => "no" },
|
---|
99 | { 'name' => "buttonname",
|
---|
100 | 'desc' => "{BasClas.buttonname}",
|
---|
101 | 'type' => "string",
|
---|
102 | 'deft' => "Phrase",
|
---|
103 | 'reqd' => "no" },
|
---|
104 | { 'name' => "language",
|
---|
105 | 'desc' => "{Phind.language}",
|
---|
106 | 'type' => "string",
|
---|
107 | 'deft' => "en",
|
---|
108 | 'reqd' => "no" },
|
---|
109 | { 'name' => "savephrases",
|
---|
110 | 'desc' => "{Phind.savephrases}",
|
---|
111 | 'type' => "string",
|
---|
112 | 'deft' => "",
|
---|
113 | 'reqd' => "no" },
|
---|
114 | { 'name' => "suffixmode",
|
---|
115 | 'desc' => "{Phind.suffixmode}",
|
---|
116 | 'type' => "int",
|
---|
117 | 'deft' => "1",
|
---|
118 | 'range' => "0,1",
|
---|
119 | 'reqd' => "no" },
|
---|
120 | { 'name' => "min_occurs",
|
---|
121 | 'desc' => "{Phind.min_occurs}",
|
---|
122 | 'type' => "int",
|
---|
123 | 'deft' => "2",
|
---|
124 | 'range' => "1,",
|
---|
125 | 'reqd' => "no" },
|
---|
126 | { 'name' => "thesaurus",
|
---|
127 | 'desc' => "{Phind.thesaurus}",
|
---|
128 | 'type' => "string",
|
---|
129 | 'deft' => "",
|
---|
130 | 'reqd' => "no" },
|
---|
131 | { 'name' => "untidy",
|
---|
132 | 'desc' => "{Phind.untidy}",
|
---|
133 | 'type' => "flag",
|
---|
134 | 'reqd' => "no" } ];
|
---|
135 |
|
---|
136 | my $options = { 'name' => "Phind",
|
---|
137 | 'desc' => "{Phind.desc}",
|
---|
138 | 'abstract' => "no",
|
---|
139 | 'inherits' => "yes",
|
---|
140 | 'args' => $arguments };
|
---|
141 |
|
---|
142 |
|
---|
143 | # Phrase delimiter symbols - these should be abstracted out someplace
|
---|
144 |
|
---|
145 | my $colstart = "COLLECTIONSTART";
|
---|
146 | my $colend = "COLLECTIONEND";
|
---|
147 | my $doclimit = "DOCUMENTLIMIT";
|
---|
148 | my $senlimit = "SENTENCELIMIT";
|
---|
149 | my @delimiters = ($colstart, $colend, $doclimit, $senlimit);
|
---|
150 |
|
---|
151 |
|
---|
152 | # Create a new Phind browser based on collect.cfg
|
---|
153 |
|
---|
154 | sub new {
|
---|
155 | my ($class) = shift (@_);
|
---|
156 | my ($classifierslist,$inputargs,$hashArgOptLists) = @_;
|
---|
157 | push(@$classifierslist, $class);
|
---|
158 |
|
---|
159 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
|
---|
160 | push(@{$hashArgOptLists->{"OptList"}},$options);
|
---|
161 |
|
---|
162 | my $self = new BaseClassifier($classifierslist, $inputargs, $hashArgOptLists);
|
---|
163 |
|
---|
164 | if ($self->{'info_only'}) {
|
---|
165 | # don't worry about any options etc
|
---|
166 | return bless $self, $class;
|
---|
167 | }
|
---|
168 |
|
---|
169 | # Ensure the Phind generate scripts are in place
|
---|
170 | my $file1 = &util::filename_cat($ENV{'GSDLHOME'}, "bin", $ENV{'GSDLOS'}, "suffix");
|
---|
171 | $file1 .= ".exe" if $ENV{'GSDLOS'} =~ /^windows$/;
|
---|
172 | my $src = &util::filename_cat($ENV{'GSDLHOME'}, "src", "phind", "generate");
|
---|
173 | if (!(-e $file1)) {
|
---|
174 | print STDERR "Phind.pm: ERROR: The Phind \"suffix\" program is not installed.\n\n";
|
---|
175 | exit(1);
|
---|
176 | }
|
---|
177 |
|
---|
178 | # Transfer value from Auto Parsing to the variable name that used in previous GreenStone.
|
---|
179 | $self->{"indexes"} = $self->{"text"};
|
---|
180 |
|
---|
181 | # Further setup
|
---|
182 | $self->{'collection'} = $ENV{'GSDLCOLLECTION'}; # classifier information
|
---|
183 | $self->{'collectiondir'} = $ENV{'GSDLCOLLECTDIR'}; # collection directories
|
---|
184 | if (! defined $self->{'builddir'}) {
|
---|
185 | $self->{'builddir'} = &util::filename_cat($ENV{'GSDLCOLLECTDIR'}, "building");
|
---|
186 | }
|
---|
187 | $self->{'total'} = 0;
|
---|
188 |
|
---|
189 | # Clean out the unused keys
|
---|
190 | delete $self->{"text"};
|
---|
191 |
|
---|
192 | return bless $self, $class;
|
---|
193 | }
|
---|
194 |
|
---|
195 |
|
---|
196 | # Initialise the Phind classifier
|
---|
197 |
|
---|
198 | sub init {
|
---|
199 | my $self = shift (@_);
|
---|
200 |
|
---|
201 | # ensure we have a build directory
|
---|
202 | my $builddir = $self->{'builddir'};
|
---|
203 | die unless (-e "$builddir");
|
---|
204 |
|
---|
205 | # create Phind directory
|
---|
206 | my $phnumber = 1;
|
---|
207 | my $phinddir = &util::filename_cat($builddir, "phind1");
|
---|
208 | while (-e "$phinddir") {
|
---|
209 | $phnumber++;
|
---|
210 | $phinddir = &util::filename_cat($builddir, "phind$phnumber");
|
---|
211 | }
|
---|
212 | &util::mk_dir("$phinddir");
|
---|
213 | $self->{'phinddir'} = $phinddir;
|
---|
214 | $self->{'phindnumber'} = $phnumber;
|
---|
215 |
|
---|
216 | push(@removedirs, $phinddir) unless $self->{'untidy'};
|
---|
217 |
|
---|
218 | # open filehandles for documents and text
|
---|
219 | my $clausefile = &util::filename_cat("$phinddir", "clauses");
|
---|
220 | &util::rm($clausefile) if (-e $clausefile);
|
---|
221 |
|
---|
222 | my $txthandle = 'TEXT' . $phnumber;
|
---|
223 | open($txthandle, ">$clausefile") || die "Cannot open $clausefile: $!";
|
---|
224 | $self->{'txthandle'} = $txthandle;
|
---|
225 |
|
---|
226 | my $docfile = &util::filename_cat("$phinddir", "docs.txt");
|
---|
227 | &util::rm($docfile) if (-e $docfile);
|
---|
228 |
|
---|
229 | my $dochandle = 'DOC' . $phnumber;
|
---|
230 | open($dochandle, ">$docfile") || die "Cannot open $docfile: $!";
|
---|
231 | $self->{'dochandle'} = $dochandle;
|
---|
232 |
|
---|
233 | }
|
---|
234 |
|
---|
235 |
|
---|
236 | # Classify each document.
|
---|
237 | #
|
---|
238 | # Each document is passed here in turn. The classifier extracts the
|
---|
239 | # text of each and stores it in the clauses file. Document details are
|
---|
240 | # stored in the docs.txt file.
|
---|
241 |
|
---|
242 | sub classify {
|
---|
243 | my $self = shift (@_);
|
---|
244 | my ($doc_obj,$edit_mode) = @_;
|
---|
245 |
|
---|
246 | my $verbosity = $self->{'verbosity'};
|
---|
247 | my $top_section = $doc_obj->get_top_section();
|
---|
248 |
|
---|
249 | my $titlefield = $self->{'title'};
|
---|
250 |
|
---|
251 | my $title = $doc_obj->get_metadata_element ($top_section, $titlefield);
|
---|
252 | if (!defined($title)) {
|
---|
253 | $title = "";
|
---|
254 | print STDERR "Phind: document has no title\n";
|
---|
255 | }
|
---|
256 | print "process: $title\n" if ($verbosity > 2);
|
---|
257 |
|
---|
258 | # Only consider the file if it is in the correct language
|
---|
259 | my $doclanguage = $doc_obj->get_metadata_element ($top_section, "Language");
|
---|
260 | my $phrlanguage = $self->{'language'};
|
---|
261 | return if ($doclanguage && ($doclanguage !~ /$phrlanguage/i));
|
---|
262 |
|
---|
263 | if ($edit_mode eq "delete") {
|
---|
264 | # This classifier works quite differently to the others
|
---|
265 | # Probably doesn't support incremental building anyway
|
---|
266 | return;
|
---|
267 | }
|
---|
268 |
|
---|
269 | # record this file
|
---|
270 | $self->{'total'} ++;
|
---|
271 | # what is $file ???
|
---|
272 | # print "file $self->{'total'}: $file\n" if ($self->{'$verbosity'});
|
---|
273 |
|
---|
274 | # Store document details
|
---|
275 | my $OID = $doc_obj->get_OID();
|
---|
276 | $OID = "NULL" unless defined $OID;
|
---|
277 | my $dochandle = $self->{'dochandle'};
|
---|
278 | print $dochandle "<Document>\t$OID\t$title\n";
|
---|
279 |
|
---|
280 | # Store the text occuring in this object
|
---|
281 |
|
---|
282 | # output the document delimiter
|
---|
283 | my $txthandle = $self->{'txthandle'};
|
---|
284 | print $txthandle "$doclimit\n";
|
---|
285 |
|
---|
286 | # iterate over the required indexes and store their text
|
---|
287 | my $indexes = $self->{'indexes'};
|
---|
288 | my $text = "";
|
---|
289 | my ($part, $level, $field, $section, $data, $dataref);
|
---|
290 |
|
---|
291 | foreach $part (split(/,/, $indexes)) {
|
---|
292 |
|
---|
293 | # Each field has a level and a data element ((e.g. document:Title)
|
---|
294 | ($level, $field) = split(/:/, $part);
|
---|
295 | die unless ($level && $field);
|
---|
296 |
|
---|
297 | # Extract the text from every section
|
---|
298 | # (In phind, document:text and section:text are equivalent)
|
---|
299 | if ($field eq "text") {
|
---|
300 | $data = "";
|
---|
301 | $section = $doc_obj->get_top_section();
|
---|
302 | while (defined($section)) {
|
---|
303 | $data .= $doc_obj->get_text($section) . "\n";
|
---|
304 | $section = $doc_obj->get_next_section($section);
|
---|
305 | }
|
---|
306 | $text .= convert_gml_to_tokens($phrlanguage, $data) . "\n";
|
---|
307 | }
|
---|
308 |
|
---|
309 | # Extract a metadata field from a document
|
---|
310 | # (If there is more than one element of the given type, get them all.)
|
---|
311 | elsif ($level eq "document") {
|
---|
312 | $dataref = $doc_obj->get_metadata($doc_obj->get_top_section(), $field);
|
---|
313 | foreach $data (@$dataref) {
|
---|
314 | $text .= convert_gml_to_tokens($phrlanguage, $data) . "\n";
|
---|
315 | }
|
---|
316 | }
|
---|
317 |
|
---|
318 | # Extract metadata from every section in a document
|
---|
319 | elsif ($level eq "section") {
|
---|
320 | $data = "";
|
---|
321 | $section = $doc_obj->get_top_section();
|
---|
322 | while (defined($section)) {
|
---|
323 | $dataref = $doc_obj->get_metadata($section, $field);
|
---|
324 | $data .= join("\n", @$dataref) . "\n";
|
---|
325 | $section = $doc_obj->get_next_section($section);
|
---|
326 | }
|
---|
327 | $text .= convert_gml_to_tokens($phrlanguage, $data) . "\n";
|
---|
328 | }
|
---|
329 |
|
---|
330 | # Some sort of specification which I don't understand
|
---|
331 | else {
|
---|
332 | die "Unknown level ($level) in Phind index ($part)\n";
|
---|
333 | }
|
---|
334 |
|
---|
335 | }
|
---|
336 |
|
---|
337 | # output the text
|
---|
338 | $text =~ tr/\n//s;
|
---|
339 | print $txthandle "$text";
|
---|
340 | }
|
---|
341 |
|
---|
342 |
|
---|
343 | # Construct the classifier from the information already gathered
|
---|
344 | #
|
---|
345 | # When get_classify_info is called, the clauses and docs.txt files have
|
---|
346 | # already been constructed in the Phind directory. This function will
|
---|
347 | # translate them into compressed, indexed MGPP files that can be read by
|
---|
348 | # the phindcgi script. It will also register our classifier so that it
|
---|
349 | # shows up in the navigation bar.
|
---|
350 |
|
---|
351 | sub get_classify_info {
|
---|
352 | my $self = shift (@_);
|
---|
353 | my ($gli) = @_;
|
---|
354 |
|
---|
355 | close $self->{'dochandle'};
|
---|
356 | close $self->{'txthandle'};
|
---|
357 | my $verbosity = $self->{'verbosity'};
|
---|
358 | my $out = $self->{'outhandle'};
|
---|
359 | my $phinddir = $self->{'phinddir'};
|
---|
360 |
|
---|
361 | my $osextra = "";
|
---|
362 | if ($ENV{'GSDLOS'} !~ /^windows$/i) {
|
---|
363 | $osextra = " -d /";
|
---|
364 | }
|
---|
365 |
|
---|
366 | print STDERR "</Stage>\n" if $gli;
|
---|
367 |
|
---|
368 | if ($verbosity) {
|
---|
369 | print $out "\n*** Phind.pm generating indexes for ", $self->{'indexes'}, "\n";
|
---|
370 | print $out "*** in ", $self->{'phinddir'}, "\n";
|
---|
371 | }
|
---|
372 |
|
---|
373 | print STDERR "<Stage name='Phind'>\n" if $gli;
|
---|
374 |
|
---|
375 | # Construct phind indexes
|
---|
376 | my $suffixmode = $self->{'suffixmode'};
|
---|
377 | my $min_occurs = $self->{'min_occurs'};
|
---|
378 | my ($command, $status);
|
---|
379 |
|
---|
380 | # Generate the vocabulary, symbol statistics, and numbers file
|
---|
381 | # from the clauses file
|
---|
382 | print $out "\nExtracting vocabulary and statistics\n" if $verbosity;
|
---|
383 | print STDERR "<Phase name='ExtractingVocab'/>\n" if $gli;
|
---|
384 | &extract_vocabulary($self);
|
---|
385 |
|
---|
386 | # Use the suffix program to generate the phind/phrases file
|
---|
387 | print $out "\nExtracting phrases from processed text (with suffix)\n" if $verbosity;
|
---|
388 | print STDERR "<Phase name='ExtractingPhrase'/>\n" if $gli;
|
---|
389 | &execute("suffix \"$phinddir\" $suffixmode $min_occurs $verbosity", $verbosity, $out);
|
---|
390 |
|
---|
391 | # check that we generated some files. It's not necessarily an error if
|
---|
392 | # we didn't (execute() would have quit on error), but we can't go on.
|
---|
393 | my $phrasesfile=&util::filename_cat($self->{'phinddir'}, 'phrases');
|
---|
394 | if (! -r $phrasesfile) {
|
---|
395 | print STDERR "<Warning name='NoPhrasesFound'/>\n" if $gli;
|
---|
396 | print $out "\nNo phrases found for Phind classifier!\n";
|
---|
397 | return;
|
---|
398 | }
|
---|
399 |
|
---|
400 | # Create the phrase file and put phrase numbers in phind/phrases
|
---|
401 | print $out "\nSorting and renumbering phrases for input to mgpp\n" if $verbosity;
|
---|
402 | print STDERR "<Phase name='SortAndRenumber'/>\n" if $gli;
|
---|
403 | &renumber_phrases($self);
|
---|
404 |
|
---|
405 | print $out "\nCreating phrase databases\n";
|
---|
406 | print STDERR "<Phase name='PhraseDatabases'/>\n" if $gli;
|
---|
407 | my $mg_input = &util::filename_cat($phinddir, "pdata.txt");
|
---|
408 | my $mg_stem = &util::filename_cat($phinddir, "pdata");
|
---|
409 |
|
---|
410 | &execute("mgpp_passes $osextra -f \"$mg_stem\" -T1 \"$mg_input\"", $verbosity, $out);
|
---|
411 | &execute("mgpp_compression_dict $osextra -f \"$mg_stem\"", $verbosity, $out);
|
---|
412 | &execute("mgpp_passes $osextra -f \"$mg_stem\" -T2 \"$mg_input\"", $verbosity, $out);
|
---|
413 |
|
---|
414 | # create the mg index of words
|
---|
415 | print $out "\nCreating word-level search indexes\n";
|
---|
416 | print STDERR "<Phase name='WordLevelIndexes'/>\n" if $gli;
|
---|
417 | $mg_input = &util::filename_cat($phinddir, "pword.txt");
|
---|
418 | $mg_stem = &util::filename_cat($phinddir, "pword");
|
---|
419 |
|
---|
420 | &execute("mgpp_passes $osextra -f \"$mg_stem\" -T1 -I1 \"$mg_input\"", $verbosity, $out);
|
---|
421 | &execute("mgpp_compression_dict $osextra -f \"$mg_stem\"", $verbosity, $out);
|
---|
422 | &execute("mgpp_perf_hash_build $osextra -f \"$mg_stem\"", $verbosity, $out);
|
---|
423 | &execute("mgpp_passes $osextra -f \"$mg_stem\" -T2 -I2 \"$mg_input\"", $verbosity, $out);
|
---|
424 | &execute("mgpp_weights_build $osextra -f \"$mg_stem\"", $verbosity, $out);
|
---|
425 | &execute("mgpp_invf_dict $osextra -f \"$mg_stem\"", $verbosity, $out);
|
---|
426 |
|
---|
427 | &execute("mgpp_stem_idx $osextra -f \"$mg_stem\" -s 1", $verbosity, $out);
|
---|
428 | &execute("mgpp_stem_idx $osextra -f \"$mg_stem\" -s 2", $verbosity, $out);
|
---|
429 | &execute("mgpp_stem_idx $osextra -f \"$mg_stem\" -s 3", $verbosity, $out);
|
---|
430 |
|
---|
431 | # create the mg document information database
|
---|
432 | print $out "\nCreating document information databases\n";
|
---|
433 | print STDERR "<Phase name='DocInfoDatabases'/>\n" if $gli;
|
---|
434 | $mg_input = &util::filename_cat($phinddir, "docs.txt");
|
---|
435 | $mg_stem = &util::filename_cat($phinddir, "docs");
|
---|
436 |
|
---|
437 | &execute("mgpp_passes $osextra -f \"$mg_stem\" -T1 \"$mg_input\"", $verbosity, $out);
|
---|
438 | &execute("mgpp_compression_dict $osextra -f \"$mg_stem\"", $verbosity, $out);
|
---|
439 | &execute("mgpp_passes $osextra -f \"$mg_stem\" -T2 \"$mg_input\"", $verbosity, $out);
|
---|
440 |
|
---|
441 | # Return the information about the classifier that we'll later want to
|
---|
442 | # use to create macros when the Phind classifier document is displayed.
|
---|
443 | my %classifyinfo = ('thistype'=>'Invisible',
|
---|
444 | 'childtype'=>'Phind',
|
---|
445 | 'Title'=>$self->{'buttonname'},
|
---|
446 | 'parameters'=>"phindnumber=$self->{'phindnumber'}",
|
---|
447 | 'contains'=>[]);
|
---|
448 |
|
---|
449 | my $collection = $self->{'collection'};
|
---|
450 | my $url = "library?a=p&p=phind&c=$collection";
|
---|
451 | push (@{$classifyinfo{'contains'}}, {'OID'=>$url});
|
---|
452 |
|
---|
453 | return \%classifyinfo;
|
---|
454 | }
|
---|
455 |
|
---|
456 |
|
---|
457 |
|
---|
458 | sub convert_gml_to_tokens {
|
---|
459 |
|
---|
460 | my ($language_exp, $text) = @_;
|
---|
461 |
|
---|
462 | # escape any magic words... - jrm21
|
---|
463 | foreach my $delim (@delimiters) {
|
---|
464 | my $replacement=lc($delim);
|
---|
465 | my $num= $text=~ s/$delim/$replacement/g;
|
---|
466 | if (!$num) {$num=0;}
|
---|
467 | }
|
---|
468 |
|
---|
469 | if ($language_exp =~ /en/) {
|
---|
470 | return &convert_gml_to_tokens_EN($text);
|
---|
471 | }
|
---|
472 |
|
---|
473 | if ($language_exp =~ /zh/) {
|
---|
474 | return &convert_gml_to_tokens_ZH($text);
|
---|
475 | }
|
---|
476 |
|
---|
477 | $_ = $text;
|
---|
478 |
|
---|
479 | # 1. remove GML tags
|
---|
480 |
|
---|
481 | # Remove everything that is in a tag
|
---|
482 | s/\s*<p>\s*/ PARAGRAPHBREAK /isgo;
|
---|
483 | s/\s*<br>\s*/ LINEBREAK /isgo;
|
---|
484 | s/<[^>]*>/ /sgo;
|
---|
485 |
|
---|
486 | # Now we have the text, but it may contain HTML
|
---|
487 | # elements coded as > etc. Remove these tags.
|
---|
488 | s/&/&/sgo;
|
---|
489 | s/</</sgo;
|
---|
490 | s/>/>/sgo;
|
---|
491 | s/\s*<p>\s*/ PARAGRAPHBREAK /isgo;
|
---|
492 | s/\s*<br>\s*/ LINEBREAK /isgo;
|
---|
493 | s/<[^>]*>/ /sgo;
|
---|
494 |
|
---|
495 | # replace<p> and <br> placeholders with clause break symbol (\n)
|
---|
496 | s/\s+/ /gso;
|
---|
497 | s/PARAGRAPHBREAK/\n/sgo;
|
---|
498 | s/LINEBREAK/\n/sgo;
|
---|
499 |
|
---|
500 |
|
---|
501 |
|
---|
502 |
|
---|
503 | # 2. Split the remaining text into space-delimited tokens
|
---|
504 |
|
---|
505 | # Convert any HTML special characters (like ") to their UTF8 equivalent
|
---|
506 | s/&([^;]+);/&unicode::ascii2utf8(\&ghtml::getcharequiv($1,1))/gse;
|
---|
507 |
|
---|
508 | # Split text at word boundaries
|
---|
509 | s/\b/ /go;
|
---|
510 |
|
---|
511 | # 3. Convert the remaining text to "clause format"
|
---|
512 |
|
---|
513 | # Insert newline if the end of a sentence is detected
|
---|
514 | # (delimter is: "[\.\?\!]\s")
|
---|
515 | # s/\s*[\.\?\!]\s+/\n/go;
|
---|
516 |
|
---|
517 | # remove unnecessary punctuation and replace with clause break symbol (\n)
|
---|
518 | s/[^\w ]/\n/go;
|
---|
519 |
|
---|
520 | # remove extraneous whitespace
|
---|
521 | s/ +/ /sgo;
|
---|
522 | s/^\s+//mgo;
|
---|
523 | s/\s*$/\n/mgo;
|
---|
524 |
|
---|
525 | # remove lines that contain one word or less
|
---|
526 | s/^\S*$//mgo;
|
---|
527 | s/^\s*$//mgo;
|
---|
528 | tr/\n//s;
|
---|
529 |
|
---|
530 | return $_;
|
---|
531 | }
|
---|
532 |
|
---|
533 | # a chinese version
|
---|
534 | sub convert_gml_to_tokens_ZH {
|
---|
535 |
|
---|
536 | $_ = shift @_;
|
---|
537 |
|
---|
538 | # Replace all whitespace with a simple space
|
---|
539 | s/\s+/ /gs;
|
---|
540 | # Remove everything that is in a tag
|
---|
541 | s/\s*<p>\s*/ PARAGRAPHBREAK /isg;
|
---|
542 | s/\s*<br>\s*/ LINEBREAK /isg;
|
---|
543 | s/<[^>]*>/ /sg;
|
---|
544 |
|
---|
545 | # Now we have the text, but it may contain HTML
|
---|
546 | # elements coded as > etc. Remove these tags.
|
---|
547 | s/</</sg;
|
---|
548 | s/>/>/sg;
|
---|
549 |
|
---|
550 | s/\s+/ /sg;
|
---|
551 | s/\s*<p>\s*/ PARAGRAPHBREAK /isg;
|
---|
552 | s/\s*<br>\s*/ LINEBREAK /isg;
|
---|
553 | s/<[^>]*>/ /sg;
|
---|
554 |
|
---|
555 | # remove & and other miscellaneous markup tags
|
---|
556 | s/&/&/sg;
|
---|
557 | s/</</sg;
|
---|
558 | s/>/>/sg;
|
---|
559 | s/&/&/sg;
|
---|
560 |
|
---|
561 | # replace<p> and <br> placeholders with carriage returns
|
---|
562 | s/PARAGRAPHBREAK/\n/sg;
|
---|
563 | s/LINEBREAK/\n/sg;
|
---|
564 |
|
---|
565 |
|
---|
566 | # print STDERR "text:$_\n";
|
---|
567 | return $_;
|
---|
568 | }
|
---|
569 |
|
---|
570 | # A version of convert_gml_to_tokens that is fine-tuned to the English language.
|
---|
571 |
|
---|
572 | sub convert_gml_to_tokens_EN {
|
---|
573 | $_ = shift @_;
|
---|
574 |
|
---|
575 | # FIRST, remove GML tags
|
---|
576 |
|
---|
577 | # Replace all whitespace with a simple space
|
---|
578 | s/\s+/ /gs;
|
---|
579 |
|
---|
580 | # Remove everything that is in a tag
|
---|
581 | s/\s*<p>\s*/ PARAGRAPHBREAK /isg;
|
---|
582 | s/\s*<br>\s*/ LINEBREAK /isg;
|
---|
583 | s/<[^>]*>/ /sg;
|
---|
584 |
|
---|
585 | # Now we have the text, but it may contain HTML
|
---|
586 | # elements coded as > etc. Remove these tags.
|
---|
587 | s/</</sg;
|
---|
588 | s/>/>/sg;
|
---|
589 |
|
---|
590 | s/\s+/ /sg;
|
---|
591 | s/\s*<p>\s*/ PARAGRAPHBREAK /isg;
|
---|
592 | s/\s*<br>\s*/ LINEBREAK /isg;
|
---|
593 | s/<[^>]*>/ /sg;
|
---|
594 |
|
---|
595 | # remove & and other miscellaneous markup tags
|
---|
596 | s/&/&/sg;
|
---|
597 | s/</</sg;
|
---|
598 | s/>/>/sg;
|
---|
599 | s/&/&/sg;
|
---|
600 |
|
---|
601 | # replace<p> and <br> placeholders with carriage returns
|
---|
602 | s/PARAGRAPHBREAK/\n/sg;
|
---|
603 | s/LINEBREAK/\n/sg;
|
---|
604 |
|
---|
605 |
|
---|
606 | # Exceptional punctuation
|
---|
607 | #
|
---|
608 | # We make special cases of some punctuation
|
---|
609 |
|
---|
610 | # remove any apostrophe that indicates omitted letters
|
---|
611 | s/(\w+)\'(\w*\s)/ $1$2 /g;
|
---|
612 |
|
---|
613 | # remove period that appears in a person's initals
|
---|
614 | s/\s([A-Z])\./ $1 /g;
|
---|
615 |
|
---|
616 | # replace hyphens in hypheanted words and names with a space
|
---|
617 | s/([A-Za-z])-\s*([A-Za-z])/$1 $2/g;
|
---|
618 |
|
---|
619 | # Convert the remaining text to "clause format",
|
---|
620 | # This means removing all excess punctuation and garbage text,
|
---|
621 | # normalising valid punctuation to fullstops and commas,
|
---|
622 | # then putting one cluse on each line.
|
---|
623 |
|
---|
624 | # Insert newline when the end of a sentence is detected
|
---|
625 | # (delimter is: "[\.\?\!]\s")
|
---|
626 | s/\s*[\.\?\!]\s+/\n/g;
|
---|
627 |
|
---|
628 | # split numbers after four digits
|
---|
629 | s/(\d\d\d\d)/$1 /g;
|
---|
630 |
|
---|
631 | # split words after 32 characters
|
---|
632 |
|
---|
633 | # squash repeated punctuation
|
---|
634 | tr/A-Za-z0-9 //cs;
|
---|
635 |
|
---|
636 | # save email addresses
|
---|
637 | # s/\w+@\w+\.[\w\.]+/EMAIL/g;
|
---|
638 |
|
---|
639 | # normalise clause breaks (mostly punctuation symbols) to commas
|
---|
640 | s/[^A-Za-z0-9 \n]+/ , /g;
|
---|
641 |
|
---|
642 | # Remove repeated commas, and replace with newline
|
---|
643 | s/\s*,[, ]+/\n/g;
|
---|
644 |
|
---|
645 | # remove extra whitespace
|
---|
646 | s/ +/ /sg;
|
---|
647 | s/^\s+//mg;
|
---|
648 | s/\s*$/\n/mg;
|
---|
649 |
|
---|
650 | # remove lines that contain one word or less
|
---|
651 | s/^\w*$//mg;
|
---|
652 | s/^\s*$//mg;
|
---|
653 | tr/\n//s;
|
---|
654 |
|
---|
655 | return $_;
|
---|
656 |
|
---|
657 | }
|
---|
658 |
|
---|
659 |
|
---|
660 |
|
---|
661 | # Execute a system command
|
---|
662 |
|
---|
663 | sub execute {
|
---|
664 | my ($command, $verbosity, $outhandle) = @_;
|
---|
665 | print $outhandle "Executing: $command\n" if ($verbosity > 2);
|
---|
666 | $! = 0;
|
---|
667 | my $status = system($command);
|
---|
668 | if ($status != 0) {
|
---|
669 | print STDERR "Phind - Error executing '$command': $!\n";
|
---|
670 | exit($status); # this causes the build to fail...
|
---|
671 | }
|
---|
672 | }
|
---|
673 |
|
---|
674 |
|
---|
675 | # Generate the vocabulary, symbol statistics, and numbers file from the
|
---|
676 | # clauses file. This is legacy code, so is a bit messy and probably wont
|
---|
677 | # run under windows.
|
---|
678 |
|
---|
679 | sub extract_vocabulary {
|
---|
680 | my ($self) = @_;
|
---|
681 |
|
---|
682 | my $verbosity = $self->{'verbosity'};
|
---|
683 | my $out = $self->{'outhandle'};
|
---|
684 |
|
---|
685 | my $collectiondir = $self->{'collectiondir'};
|
---|
686 | my $phinddir = $self->{'phinddir'};
|
---|
687 |
|
---|
688 | my $language_exp = $self->{'language'};
|
---|
689 |
|
---|
690 | my ($w, $l, $line, $word);
|
---|
691 |
|
---|
692 | my ($first_delimiter, $last_delimiter,
|
---|
693 | $first_stopword, $last_stopword,
|
---|
694 | $first_extractword, $last_extractword,
|
---|
695 | $first_contentword, $last_contentword,
|
---|
696 | $phrasedelimiter);
|
---|
697 |
|
---|
698 | my $thesaurus = $self->{'thesaurus'};
|
---|
699 | my ($thesaurus_links, $thesaurus_terms,
|
---|
700 | %thesaurus, $first_thesaurusword, $last_thesaurusword);
|
---|
701 |
|
---|
702 | my %symbol;
|
---|
703 | my (%freq);
|
---|
704 |
|
---|
705 | print $out "Calculating vocabulary\n" if ($verbosity > 1);
|
---|
706 |
|
---|
707 | # Read and store the stopwords
|
---|
708 | my $stopdir = &util::filename_cat($ENV{'GSDLHOME'}, "etc", "packages", "phind", "stopword");
|
---|
709 | my $stopword_files = ();
|
---|
710 | my ($language, $language_dir, $file, $file_name);
|
---|
711 | my %stopwords;
|
---|
712 |
|
---|
713 | # Examine each directory in the stopword directory
|
---|
714 | opendir(STOPDIR, $stopdir);
|
---|
715 | foreach $language (readdir STOPDIR) {
|
---|
716 |
|
---|
717 | # Ignore entries that do not match the classifier's language
|
---|
718 | next unless ($language =~ /$language_exp/);
|
---|
719 | $language_dir = &util::filename_cat($stopdir, $language);
|
---|
720 | next unless (-d "$language_dir");
|
---|
721 |
|
---|
722 | opendir(LANGDIR, $language_dir);
|
---|
723 | foreach $file (readdir LANGDIR) {
|
---|
724 |
|
---|
725 | # Ignore entries that are not stopword files
|
---|
726 | next unless ($file =~ /sw$/);
|
---|
727 | $file_name = &util::filename_cat($language_dir, $file);
|
---|
728 | next unless (-f "$file_name");
|
---|
729 |
|
---|
730 | # Read the stopwords
|
---|
731 | open(STOPFILE, "<$file_name");
|
---|
732 | while (<STOPFILE>) {
|
---|
733 | s/^\s+//;
|
---|
734 | s/\s.*//;
|
---|
735 | $word = $_;
|
---|
736 | $l = lc($word);
|
---|
737 | $stopwords{$l} = $word;
|
---|
738 | }
|
---|
739 | close STOPFILE;
|
---|
740 |
|
---|
741 | }
|
---|
742 | closedir LANGDIR;
|
---|
743 | }
|
---|
744 | closedir STOPDIR;
|
---|
745 |
|
---|
746 | # Read thesaurus information
|
---|
747 | if ($thesaurus) {
|
---|
748 |
|
---|
749 | # link file exists
|
---|
750 | $thesaurus_links = &util::filename_cat($collectiondir, "etc", "$thesaurus.lnk");
|
---|
751 | die "Cannot find thesaurus link file" unless (-e "$thesaurus_links");
|
---|
752 |
|
---|
753 | # ensure term file exists in the correct language
|
---|
754 | if ($language_exp =~ /^([a-z][a-z])/) {
|
---|
755 | $language = $1;
|
---|
756 | } else {
|
---|
757 | $language = 'en';
|
---|
758 | }
|
---|
759 | $thesaurus_terms = &util::filename_cat($collectiondir, "etc", "$thesaurus.$language");
|
---|
760 | die "Cannot find thesaurus term file" unless (-e "$thesaurus_terms");
|
---|
761 |
|
---|
762 |
|
---|
763 | # Read the thesaurus terms
|
---|
764 | open(TH, "<$thesaurus_terms");
|
---|
765 | while(<TH>) {
|
---|
766 | s/^\d+ //;
|
---|
767 | s/\(.*\)//;
|
---|
768 | foreach $w (split(/\s+/, $_)) {
|
---|
769 | $thesaurus{lc($w)} = $w;
|
---|
770 | }
|
---|
771 | }
|
---|
772 | close TH;
|
---|
773 | }
|
---|
774 |
|
---|
775 | # Read words in the text and count occurences
|
---|
776 | open(TXT, "<$phinddir/clauses");
|
---|
777 |
|
---|
778 | my @words;
|
---|
779 | while(<TXT>) {
|
---|
780 | $line = $_;
|
---|
781 | next unless ($line =~ /./);
|
---|
782 |
|
---|
783 | @words = split(/\s+/, $line);
|
---|
784 | foreach $w (@words) {
|
---|
785 | $l = lc($w);
|
---|
786 | $w = $l if ((defined $stopwords{$l}) || (defined $thesaurus{$l}));
|
---|
787 | $freq{$w}++;
|
---|
788 | }
|
---|
789 | $freq{$senlimit}++;
|
---|
790 | }
|
---|
791 |
|
---|
792 | close TXT;
|
---|
793 |
|
---|
794 | # Calculate the "best" form of each word
|
---|
795 | my (%bestform, %totalfreq, %bestfreq);
|
---|
796 |
|
---|
797 | foreach $w (sort (keys %freq)) {
|
---|
798 | $l = lc($w);
|
---|
799 |
|
---|
800 | # totalfreq is the number of times a term appears in any form
|
---|
801 | $totalfreq{$l} += $freq{$w};
|
---|
802 |
|
---|
803 | if (defined $stopwords{$l}) {
|
---|
804 | $bestform{$l} = $stopwords{$l};
|
---|
805 |
|
---|
806 | } elsif (defined $thesaurus{$l}) {
|
---|
807 | $bestform{$l} = $thesaurus{$l};
|
---|
808 |
|
---|
809 | } elsif (!$bestform{$l} || ($freq{$w} > $bestfreq{$l})) {
|
---|
810 | $bestfreq{$l} = $freq{$w};
|
---|
811 | $bestform{$l} = $w;
|
---|
812 | }
|
---|
813 | }
|
---|
814 | undef %freq;
|
---|
815 | undef %bestfreq;
|
---|
816 |
|
---|
817 |
|
---|
818 | # Assign symbol numbers to tokens
|
---|
819 | my $nextsymbol = 1;
|
---|
820 | my (@vocab);
|
---|
821 |
|
---|
822 | # Delimiters
|
---|
823 | $first_delimiter = 1;
|
---|
824 |
|
---|
825 | foreach $word (@delimiters) {
|
---|
826 |
|
---|
827 | # $word = lc($word); # jrm21
|
---|
828 | $word = uc($word);
|
---|
829 | $bestform{$word} = $word;
|
---|
830 | $vocab[$nextsymbol] = $word;
|
---|
831 | $symbol{$word} = $nextsymbol;
|
---|
832 | $nextsymbol++;
|
---|
833 | }
|
---|
834 | $last_delimiter = $nextsymbol - 1;
|
---|
835 | # Stopwords
|
---|
836 | $first_stopword = $nextsymbol;
|
---|
837 |
|
---|
838 | foreach my $word (sort keys %stopwords) {
|
---|
839 | # don't include stopword unless it occurs in the text
|
---|
840 | $word = lc($word);
|
---|
841 | next unless ($totalfreq{$word});
|
---|
842 | next if ($symbol{$word});
|
---|
843 |
|
---|
844 | $vocab[$nextsymbol] = $word;
|
---|
845 | $symbol{$word} = $nextsymbol;
|
---|
846 | $nextsymbol++;
|
---|
847 | }
|
---|
848 | $last_stopword = $nextsymbol - 1;
|
---|
849 | $first_contentword = $nextsymbol;
|
---|
850 |
|
---|
851 | # Thesaurus terms
|
---|
852 | if ($thesaurus) {
|
---|
853 | $first_thesaurusword = $nextsymbol;
|
---|
854 |
|
---|
855 | foreach my $word (sort keys %thesaurus) {
|
---|
856 |
|
---|
857 | $word = lc($word);
|
---|
858 | next if ($symbol{$word});
|
---|
859 | $bestform{$word} = $thesaurus{$word};
|
---|
860 |
|
---|
861 | $vocab[$nextsymbol] = $word;
|
---|
862 | $symbol{$word} = $nextsymbol;
|
---|
863 | $nextsymbol++;
|
---|
864 |
|
---|
865 | }
|
---|
866 | $last_thesaurusword = $nextsymbol - 1;
|
---|
867 | }
|
---|
868 |
|
---|
869 | # Other content words
|
---|
870 | $first_extractword = $nextsymbol;
|
---|
871 |
|
---|
872 | foreach my $word (sort (keys %bestform)) {
|
---|
873 |
|
---|
874 | next if ($symbol{$word});
|
---|
875 |
|
---|
876 | $vocab[$nextsymbol] = $word;
|
---|
877 | $symbol{$word} = $nextsymbol;
|
---|
878 | $nextsymbol++;
|
---|
879 | }
|
---|
880 | $last_extractword = $nextsymbol - 1;
|
---|
881 | $last_contentword = $nextsymbol - 1;
|
---|
882 |
|
---|
883 | # Outut the words
|
---|
884 | print $out "Saving vocabulary in $phinddir/clauses.vocab\n" if ($verbosity > 1);
|
---|
885 | open(VOC, ">$phinddir/clauses.vocab");
|
---|
886 |
|
---|
887 | for (my $i = 1; $i < $nextsymbol; $i++) {
|
---|
888 | $w = $vocab[$i];
|
---|
889 |
|
---|
890 | print VOC "$bestform{$w}\n";
|
---|
891 | $totalfreq{$w} = 0 unless ($totalfreq{$w});
|
---|
892 | }
|
---|
893 | close VOC;
|
---|
894 |
|
---|
895 |
|
---|
896 | # Create statistics file
|
---|
897 | # Output statistics about the vocablary
|
---|
898 | print $out "Saving statistics in $phinddir/clauses.stats\n" if ($verbosity > 1);
|
---|
899 | &util::rm("$phinddir/clauses.stats") if (-e "$phinddir/clauses.stats");
|
---|
900 |
|
---|
901 | open(STAT, ">$phinddir/clauses.stats")
|
---|
902 | || die "Cannot open $phinddir/clauses.stats: $!";
|
---|
903 |
|
---|
904 | print STAT "first_delimiter $first_delimiter\n";
|
---|
905 | print STAT "last_delimiter $last_delimiter\n";
|
---|
906 | print STAT "first_stopword $first_stopword\n";
|
---|
907 | print STAT "last_stopword $last_stopword\n";
|
---|
908 | if ($thesaurus) {
|
---|
909 | print STAT "first_thesaurusword $first_thesaurusword\n";
|
---|
910 | print STAT "last_thesaurusword $last_thesaurusword\n";
|
---|
911 | }
|
---|
912 | print STAT "first_extractword $first_extractword\n";
|
---|
913 | print STAT "last_extractword $last_extractword\n";
|
---|
914 | print STAT "first_contentword $first_contentword\n";
|
---|
915 | print STAT "last_contentword $last_contentword\n";
|
---|
916 | print STAT "first_symbol $first_delimiter\n";
|
---|
917 | print STAT "last_symbol $last_contentword\n";
|
---|
918 | print STAT "first_word $first_stopword\n";
|
---|
919 | print STAT "last_word $last_contentword\n";
|
---|
920 | close STAT;
|
---|
921 |
|
---|
922 | undef @vocab;
|
---|
923 |
|
---|
924 |
|
---|
925 | # Create numbers file
|
---|
926 | # Save text as symbol numbers
|
---|
927 | print $out "Saving text as numbers in $phinddir/clauses.numbers\n" if ($verbosity > 1);
|
---|
928 |
|
---|
929 | open(TXT, "<$phinddir/clauses");
|
---|
930 | open(NUM, ">$phinddir/clauses.numbers");
|
---|
931 |
|
---|
932 | ## $phrasedelimiter = $symbol{lc($senlimit)}; # jrm21
|
---|
933 | ## print NUM "$symbol{lc($colstart)}\n"; # jrm21
|
---|
934 | $phrasedelimiter = $symbol{$senlimit};
|
---|
935 | print NUM "$symbol{$colstart}\n";
|
---|
936 |
|
---|
937 | # set up the special symbols that delimit documents and sentences
|
---|
938 | while(<TXT>) {
|
---|
939 |
|
---|
940 | # split sentence into a list of tokens
|
---|
941 | $line = $_;
|
---|
942 | next unless ($line =~ /./);
|
---|
943 | @words = split(/\s+/, $line);
|
---|
944 |
|
---|
945 | # output one token at a time
|
---|
946 | foreach $word (@words) {
|
---|
947 | # don't lower-case special delimiters - jrm21
|
---|
948 | if (!map {if ($word eq $_) {1} else {()}} @delimiters) {
|
---|
949 | $word = lc($word);
|
---|
950 | }
|
---|
951 | print NUM "$symbol{$word}\n";
|
---|
952 | }
|
---|
953 |
|
---|
954 | # output phrase delimiter
|
---|
955 | print NUM "$phrasedelimiter\n";
|
---|
956 | }
|
---|
957 |
|
---|
958 | close TXT;
|
---|
959 | # print NUM "$symbol{lc($colend)}\n";# jrm21
|
---|
960 | print NUM "$symbol{$colend}\n";
|
---|
961 | close NUM;
|
---|
962 |
|
---|
963 | # Save thesaurus data in one convienient file
|
---|
964 | if ($thesaurus) {
|
---|
965 |
|
---|
966 | my $thesaurusfile = &util::filename_cat($phinddir, "$thesaurus.numbers");
|
---|
967 |
|
---|
968 |
|
---|
969 | print $out "Saving thesaurus as numbers in $thesaurusfile\n"
|
---|
970 | if ($verbosity > 1);
|
---|
971 |
|
---|
972 | # Read the thesaurus terms
|
---|
973 | my ($num, $text, %thes_symbols);
|
---|
974 |
|
---|
975 | open(TH, "<$thesaurus_terms");
|
---|
976 | while(<TH>) {
|
---|
977 | chomp;
|
---|
978 | @words = split(/\s+/, $_);
|
---|
979 | $num = shift @words;
|
---|
980 | $text = "";
|
---|
981 |
|
---|
982 | # translate words into symbol numbers
|
---|
983 | foreach $word (@words) {
|
---|
984 | $word = lc($word);
|
---|
985 | if ($symbol{$word}) {
|
---|
986 | $text .= "s$symbol{$word} ";
|
---|
987 | } elsif ($verbosity) {
|
---|
988 | print $out "Phind: No thesaurus symbol, ignoring \"$word\"\n";
|
---|
989 | }
|
---|
990 | }
|
---|
991 | $text =~ s/ $//;
|
---|
992 | $thes_symbols{$num} = $text;
|
---|
993 | }
|
---|
994 | close TH;
|
---|
995 |
|
---|
996 | # Read the thesaurus links and write the corresponding data
|
---|
997 | open(TH, "<$thesaurus_links");
|
---|
998 | open(THOUT, ">$thesaurusfile");
|
---|
999 |
|
---|
1000 | while(<TH>) {
|
---|
1001 | chomp;
|
---|
1002 | ($num, $text) = split(/:/, $_);
|
---|
1003 |
|
---|
1004 | if (defined($thes_symbols{$num})) {
|
---|
1005 | print THOUT "$num:$thes_symbols{$num}:$text\n";
|
---|
1006 | } else {
|
---|
1007 | print THOUT "$num:untranslated:$text\n";
|
---|
1008 | }
|
---|
1009 | }
|
---|
1010 | close TH;
|
---|
1011 | close THOUT;
|
---|
1012 | }
|
---|
1013 |
|
---|
1014 |
|
---|
1015 |
|
---|
1016 |
|
---|
1017 | }
|
---|
1018 |
|
---|
1019 |
|
---|
1020 | # renumber_phrases
|
---|
1021 | #
|
---|
1022 | # Prepare the phrases file to be input to mgpp. The biggest problem is
|
---|
1023 | # reconciling the phrase identifiers used by the suffix program (which
|
---|
1024 | # we'll call suffix-id numbers) with the numbers used in the thesaurus
|
---|
1025 | # (theesaurus-id) to create a ciommon set of phind id numbers (phind-id).
|
---|
1026 | # Phind-id numbers must be sorted by frequency of occurance.
|
---|
1027 | #
|
---|
1028 | # Start creating a set of phind-id numbers from the sorted suffix-id
|
---|
1029 | # numbers and (if required) the thesaurus-id numbers. Then add any other
|
---|
1030 | # phrases occuring in the thesaurus.
|
---|
1031 | #
|
---|
1032 | # The last thing we have to do is restore the vocabulary information to the
|
---|
1033 | # phrase file so that the phrases are stored as words, not as symbol
|
---|
1034 | # numbers.
|
---|
1035 |
|
---|
1036 | # The original phrases file looks something like this:
|
---|
1037 | # 159396-1:s5175:4:1:116149-2:3:d2240,2;d2253;d2254
|
---|
1038 | # 159409-1:s5263:6:1:159410-2:6:d2122;d2128;d2129;d2130;d2215;d2380
|
---|
1039 | # 159415-1:s5267:9:1:159418-2:8:d3,2;d632;d633;d668;d1934;d2010;d2281;d2374
|
---|
1040 | # 159426-1:s5273:5:2:159429-2,115168-17:5:d252;d815;d938;d939;d2361
|
---|
1041 |
|
---|
1042 |
|
---|
1043 | sub renumber_phrases {
|
---|
1044 | my ($self) = @_;
|
---|
1045 |
|
---|
1046 | renumber_suffix_data($self);
|
---|
1047 | renumber_thesaurus_data($self);
|
---|
1048 | restore_vocabulary_data($self);
|
---|
1049 |
|
---|
1050 | }
|
---|
1051 |
|
---|
1052 |
|
---|
1053 |
|
---|
1054 | # renumber_suffix_data
|
---|
1055 | #
|
---|
1056 | # Translate phrases file to phrases.2 using phind keys instead
|
---|
1057 | # of suffix keys and sorting the expansion data.
|
---|
1058 |
|
---|
1059 | sub renumber_suffix_data {
|
---|
1060 | my ($self) = @_;
|
---|
1061 |
|
---|
1062 | my $verbosity = $self->{'verbosity'};
|
---|
1063 | my $out = $self->{'outhandle'};
|
---|
1064 | print $out "Translate phrases: suffix-ids become phind-id's\n"
|
---|
1065 | if ($verbosity);
|
---|
1066 |
|
---|
1067 | my $phinddir = $self->{'phinddir'};
|
---|
1068 | my $infile = &util::filename_cat($phinddir, 'phrases');
|
---|
1069 | my $outfile = &util::filename_cat($phinddir, 'phrases.2');
|
---|
1070 |
|
---|
1071 | # Read the phrase file. Calculate initial set of phind-id
|
---|
1072 | # numbers and store (suffixid -> frequency) relation.
|
---|
1073 |
|
---|
1074 | my %suffixtophind;
|
---|
1075 | my @totalfrequency;
|
---|
1076 | my (@fields, $suffixid);
|
---|
1077 | my $nextphind = 1;
|
---|
1078 |
|
---|
1079 | open(IN, "<$infile");
|
---|
1080 | while(<IN>) {
|
---|
1081 |
|
---|
1082 | chomp;
|
---|
1083 | @fields = split(/:/, $_);
|
---|
1084 |
|
---|
1085 | # get next suffixid and phindid
|
---|
1086 | $suffixid = shift @fields;
|
---|
1087 | $suffixtophind{$suffixid} = $nextphind;
|
---|
1088 |
|
---|
1089 | # store total frequency
|
---|
1090 | shift @fields;
|
---|
1091 | $totalfrequency[$nextphind] = shift @fields;
|
---|
1092 |
|
---|
1093 | $nextphind++;
|
---|
1094 | }
|
---|
1095 | close IN;
|
---|
1096 |
|
---|
1097 |
|
---|
1098 | # Translate phrases file to phrases.2. Use phind keys (not suffix
|
---|
1099 | # keys), sort expansion and document occurance data in order of
|
---|
1100 | # descending frequency..
|
---|
1101 | open(IN, "<$infile");
|
---|
1102 | open(OUT, ">$outfile");
|
---|
1103 |
|
---|
1104 | my ($phindid, $text, $tf, $countexp, $expansions, $countdocs, $documents);
|
---|
1105 | my (@documwents, @newexp, $k, $n);
|
---|
1106 | my $linenumber = 0;
|
---|
1107 |
|
---|
1108 | while(<IN>) {
|
---|
1109 |
|
---|
1110 | # read the line
|
---|
1111 | chomp;
|
---|
1112 | @fields = split(/:/, $_);
|
---|
1113 |
|
---|
1114 | # get a phrase number for this line
|
---|
1115 | $suffixid = shift @fields;
|
---|
1116 | die unless (defined($suffixtophind{$suffixid}));
|
---|
1117 | $phindid = $suffixtophind{$suffixid};
|
---|
1118 |
|
---|
1119 | # get the symbols in the phrase
|
---|
1120 | $text = shift @fields;
|
---|
1121 |
|
---|
1122 | # output status information
|
---|
1123 | $linenumber++;
|
---|
1124 | if ($verbosity > 2) {
|
---|
1125 | if ($linenumber % 1000 == 0) {
|
---|
1126 | print $out "line $linenumber:\t$phindid\t$suffixid\t($text)\n";
|
---|
1127 | }
|
---|
1128 | # what are $num and $key??
|
---|
1129 | #print $out "$num: $key\t($text)\n" if ($verbosity > 3);
|
---|
1130 | }
|
---|
1131 |
|
---|
1132 | # get the phrase frequency
|
---|
1133 | $tf = shift @fields;
|
---|
1134 |
|
---|
1135 | # get the number of expansions
|
---|
1136 | $countexp = shift @fields;
|
---|
1137 |
|
---|
1138 | # get the expansions, convert them into phind-id numbers, and sort them
|
---|
1139 | $expansions = shift @fields;
|
---|
1140 | @newexp = ();
|
---|
1141 | foreach $k (split(/,/, $expansions)) {
|
---|
1142 | die "ERROR - no phindid for: $k" unless (defined($suffixtophind{$k}));
|
---|
1143 | $n = $suffixtophind{$k};
|
---|
1144 | push @newexp, $n;
|
---|
1145 | }
|
---|
1146 | @newexp = sort {$totalfrequency[$b] <=> $totalfrequency[$a]} @newexp;
|
---|
1147 |
|
---|
1148 | # get the number of documents
|
---|
1149 | $countdocs = shift @fields;
|
---|
1150 |
|
---|
1151 | # get the documents and sort them
|
---|
1152 | $documents = shift @fields;
|
---|
1153 | $documents =~ s/d//g;
|
---|
1154 | my @documents = split(/;/, $documents);
|
---|
1155 | @documents = sort by_doc_frequency @documents;
|
---|
1156 |
|
---|
1157 | # output the phrase data
|
---|
1158 | print OUT "$phindid:$text:$tf:$countexp:$countdocs:";
|
---|
1159 | print OUT join(",", @newexp), ",:", join(";", @documents), ";\n";
|
---|
1160 |
|
---|
1161 | }
|
---|
1162 |
|
---|
1163 | close IN;
|
---|
1164 | close OUT;
|
---|
1165 | }
|
---|
1166 |
|
---|
1167 |
|
---|
1168 | # renumber_thesaurus_data
|
---|
1169 | #
|
---|
1170 | # Translate phrases.2 to phrases.3, adding thesaurus data if available.
|
---|
1171 |
|
---|
1172 | sub renumber_thesaurus_data {
|
---|
1173 | my ($self) = @_;
|
---|
1174 |
|
---|
1175 | my $out = $self->{'outhandle'};
|
---|
1176 | my $verbosity = $self->{'verbosity'};
|
---|
1177 | my $thesaurus = $self->{'thesaurus'};
|
---|
1178 |
|
---|
1179 | my $phinddir = $self->{'phinddir'};
|
---|
1180 | my $infile = &util::filename_cat($phinddir, "phrases.2");
|
---|
1181 | my $outfile = &util::filename_cat($phinddir, "phrases.3");
|
---|
1182 |
|
---|
1183 |
|
---|
1184 | # If no thesaurus is defined, simply move the phrases file.
|
---|
1185 | if (!$thesaurus) {
|
---|
1186 | print $out "Translate phrases.2: no thesaurus data\n"
|
---|
1187 | if ($verbosity);
|
---|
1188 | &util::mv($infile, $outfile);
|
---|
1189 | return;
|
---|
1190 | }
|
---|
1191 |
|
---|
1192 | print $out "Translate phrases.2: add thesaurus data\n"
|
---|
1193 | if ($verbosity);
|
---|
1194 |
|
---|
1195 | # 1.
|
---|
1196 | # Read thesaurus file and store (symbols->thesaurusid) mapping
|
---|
1197 | my $thesaurusfile = &util::filename_cat($phinddir, "$thesaurus.numbers");
|
---|
1198 | my %symbolstothesid;
|
---|
1199 | my (@fields, $thesid, $symbols);
|
---|
1200 |
|
---|
1201 | open(TH, "<$thesaurusfile");
|
---|
1202 |
|
---|
1203 | while (<TH>) {
|
---|
1204 |
|
---|
1205 | chomp;
|
---|
1206 | @fields = split(/:/, $_);
|
---|
1207 |
|
---|
1208 | # get id and text
|
---|
1209 | $thesid = shift @fields;
|
---|
1210 | $symbols = shift @fields;
|
---|
1211 | $symbolstothesid{$symbols} = $thesid;
|
---|
1212 | }
|
---|
1213 | close TH;
|
---|
1214 |
|
---|
1215 | # 2.
|
---|
1216 | # Read phrases file to find thesaurus entries that already
|
---|
1217 | # have a phindid. Store their phind-ids for later translation,
|
---|
1218 | # and store their frequency for later sorting.
|
---|
1219 | my %thesaurustophindid;
|
---|
1220 | my %phindidtofrequency;
|
---|
1221 | my ($phindid, $freq);
|
---|
1222 |
|
---|
1223 | open(IN, "<$infile");
|
---|
1224 |
|
---|
1225 | while(<IN>) {
|
---|
1226 |
|
---|
1227 | chomp;
|
---|
1228 | @fields = split(/:/, $_);
|
---|
1229 |
|
---|
1230 | # phindid and symbols for this line
|
---|
1231 | $phindid = shift @fields;
|
---|
1232 | $symbols = shift @fields;
|
---|
1233 | $freq = shift @fields;
|
---|
1234 |
|
---|
1235 | # do we have a thesaurus id corresponding to this phrase?
|
---|
1236 | if (defined($symbolstothesid{$symbols})) {
|
---|
1237 | $thesid = $symbolstothesid{$symbols};
|
---|
1238 | $thesaurustophindid{$thesid} = $phindid;
|
---|
1239 | $phindidtofrequency{$phindid} = $freq;
|
---|
1240 | }
|
---|
1241 | }
|
---|
1242 | close IN;
|
---|
1243 |
|
---|
1244 | undef %symbolstothesid;
|
---|
1245 |
|
---|
1246 | # 3.
|
---|
1247 | # Create phind-id numbers for remaining thesaurus entries,
|
---|
1248 | # and note that their frequency is 0 for later sorting.
|
---|
1249 | my $nextphindid = $phindid + 1;
|
---|
1250 |
|
---|
1251 | open(TH, "<$thesaurusfile");
|
---|
1252 | while(<TH>) {
|
---|
1253 |
|
---|
1254 | chomp;
|
---|
1255 | @fields = split(/:/, $_);
|
---|
1256 |
|
---|
1257 | # read thesaurus-id and ensure it has a corresponding phind-id
|
---|
1258 | $thesid = shift @fields;
|
---|
1259 | if (!defined($thesaurustophindid{$thesid})) {
|
---|
1260 | $thesaurustophindid{$thesid} = $nextphindid;
|
---|
1261 | $phindidtofrequency{$nextphindid} = 0;
|
---|
1262 | $nextphindid++;
|
---|
1263 | }
|
---|
1264 | }
|
---|
1265 | close TH;
|
---|
1266 |
|
---|
1267 | # 4.
|
---|
1268 | # Translate thesaurus file, replacing thesaurus-id numbers with
|
---|
1269 | # phind-id numbers.
|
---|
1270 | my $newthesaurusfile = &util::filename_cat($phinddir, "$thesaurus.phindid");
|
---|
1271 | my ($relations, $linkcounter, $linktext, $linktype, @linkdata);
|
---|
1272 | my (@links, $linkid, %linkidtotype, $newrelation);
|
---|
1273 |
|
---|
1274 | open(TH, "<$thesaurusfile");
|
---|
1275 | open(TO, ">$newthesaurusfile");
|
---|
1276 | while(<TH>) {
|
---|
1277 |
|
---|
1278 | chomp;
|
---|
1279 | @fields = split(/:/, $_);
|
---|
1280 |
|
---|
1281 | # phindid and symbols for this line
|
---|
1282 | ($thesid, $symbols, $relations) = @fields;
|
---|
1283 |
|
---|
1284 | die unless ($thesid && $symbols);
|
---|
1285 | die unless $thesaurustophindid{$thesid};
|
---|
1286 | $phindid = $thesaurustophindid{$thesid};
|
---|
1287 |
|
---|
1288 | # convert each part of the relation string to use phind-id numbers
|
---|
1289 | # at the same time, we want to sort the list by frequency.
|
---|
1290 | undef %linkidtotype;
|
---|
1291 |
|
---|
1292 | foreach $linktext (split(/;/, $relations)) {
|
---|
1293 | @linkdata = split(/,/, $linktext);
|
---|
1294 |
|
---|
1295 | # remember the linktype (e.g. BT, NT)
|
---|
1296 | $linktype = shift @linkdata;
|
---|
1297 |
|
---|
1298 | # store the type of each link
|
---|
1299 | foreach $thesid (@linkdata) {
|
---|
1300 | die unless (defined($thesaurustophindid{$thesid}));
|
---|
1301 | $linkidtotype{$thesaurustophindid{$thesid}} = $linktype;
|
---|
1302 | }
|
---|
1303 | }
|
---|
1304 |
|
---|
1305 | # sort the list of links, first by frequency, then by type.
|
---|
1306 | @links = sort { ($phindidtofrequency{$b} <=> $phindidtofrequency{$a})
|
---|
1307 | or ($linkidtotype{$a} cmp $linkidtotype{$b}) } (keys %linkidtotype);
|
---|
1308 | $linkcounter = (scalar @links);
|
---|
1309 |
|
---|
1310 | # create a string describing the link information
|
---|
1311 | $linktype = $linkidtotype{$links[0]};
|
---|
1312 | $newrelation = $linktype;
|
---|
1313 | foreach $linkid (@links) {
|
---|
1314 | if ($linkidtotype{$linkid} ne $linktype) {
|
---|
1315 | $linktype = $linkidtotype{$linkid};
|
---|
1316 | $newrelation .= ";" . $linktype;
|
---|
1317 | }
|
---|
1318 | $newrelation .= "," . $linkid;
|
---|
1319 | }
|
---|
1320 | $newrelation .= ";";
|
---|
1321 |
|
---|
1322 |
|
---|
1323 | # output the new line
|
---|
1324 | print TO "$phindid:$symbols:$linkcounter:$newrelation:\n";
|
---|
1325 | }
|
---|
1326 | close TH;
|
---|
1327 | close TO;
|
---|
1328 |
|
---|
1329 | undef %thesaurustophindid;
|
---|
1330 | undef %linkidtotype;
|
---|
1331 | undef %phindidtofrequency;
|
---|
1332 |
|
---|
1333 | # 5.
|
---|
1334 | # Read thesaurus data (in phind-id format) into memory
|
---|
1335 | my %thesaurusdata;
|
---|
1336 |
|
---|
1337 | open(TH, "<$newthesaurusfile");
|
---|
1338 | while(<TH>) {
|
---|
1339 | chomp;
|
---|
1340 | ($phindid, $symbols, $linkcounter, $relations) = split(/:/, $_);
|
---|
1341 | die unless ($phindid && $symbols);
|
---|
1342 | $thesaurusdata{$phindid} = "$symbols:$linkcounter:$relations";
|
---|
1343 | }
|
---|
1344 | close TH;
|
---|
1345 |
|
---|
1346 | # 6.
|
---|
1347 | # Add thesaurus data to phrases file
|
---|
1348 | my ($text, $tf, $countexp, $expansions, $countdocs, $documents);
|
---|
1349 | my (@documwents, @newexp, $k, $n);
|
---|
1350 | my $linenumber = 0;
|
---|
1351 |
|
---|
1352 | open(IN, "<$infile");
|
---|
1353 | open(OUT, ">$outfile");
|
---|
1354 |
|
---|
1355 | # Update existing phrases
|
---|
1356 | while(<IN>) {
|
---|
1357 |
|
---|
1358 | chomp;
|
---|
1359 | @fields = split(/:/, $_);
|
---|
1360 |
|
---|
1361 | # get data for this line
|
---|
1362 | $phindid = shift @fields;
|
---|
1363 |
|
---|
1364 | # output the phrase data, with thesaurus information
|
---|
1365 | print OUT "$phindid:", join(":", @fields);
|
---|
1366 |
|
---|
1367 | # add thesaurus data
|
---|
1368 | if (defined($thesaurusdata{$phindid})) {
|
---|
1369 | @fields = split(/:/, $thesaurusdata{$phindid});
|
---|
1370 | shift @fields;
|
---|
1371 | $linkcounter = shift @fields;
|
---|
1372 | $relations = shift @fields;
|
---|
1373 |
|
---|
1374 | print OUT ":$linkcounter:$relations";
|
---|
1375 | $thesaurusdata{$phindid} = "";
|
---|
1376 | }
|
---|
1377 | print OUT "\n";
|
---|
1378 | }
|
---|
1379 | close IN;
|
---|
1380 |
|
---|
1381 | # Add phrases that aren't already in the file
|
---|
1382 | foreach $phindid (sort numerically keys %thesaurusdata) {
|
---|
1383 | next unless ($thesaurusdata{$phindid});
|
---|
1384 |
|
---|
1385 | @fields = split(/:/, $thesaurusdata{$phindid});
|
---|
1386 | $symbols = shift @fields;
|
---|
1387 | $linkcounter = shift @fields;
|
---|
1388 | $relations = shift @fields;
|
---|
1389 |
|
---|
1390 | print OUT "$phindid:$symbols:0:0:0:::$linkcounter:$relations\n";
|
---|
1391 | }
|
---|
1392 | close OUT;
|
---|
1393 |
|
---|
1394 | }
|
---|
1395 |
|
---|
1396 | # restore_vocabulary_data
|
---|
1397 | #
|
---|
1398 | # Read phrases.3 and restore vocabulary information. Then write
|
---|
1399 | # this data to the MGPP input files (pword.txt and pdata.txt) and
|
---|
1400 | # (if requested) to the saved phrases file.
|
---|
1401 |
|
---|
1402 | sub restore_vocabulary_data {
|
---|
1403 | my ($self) = @_;
|
---|
1404 |
|
---|
1405 | my $out = $self->{'outhandle'};
|
---|
1406 | my $verbosity = $self->{'verbosity'};
|
---|
1407 | print $out "Translate phrases.3: restore vocabulary\n" if ($verbosity);
|
---|
1408 |
|
---|
1409 | my $phinddir = $self->{'phinddir'};
|
---|
1410 | my $infile = &util::filename_cat($phinddir, 'phrases.3');
|
---|
1411 | my $vocabfile = &util::filename_cat($phinddir, 'clauses.vocab');
|
---|
1412 | my $datafile = &util::filename_cat($phinddir, 'pdata.txt');
|
---|
1413 | my $wordfile = &util::filename_cat($phinddir, 'pword.txt');
|
---|
1414 |
|
---|
1415 | my $savephrases = $self->{'savephrases'};
|
---|
1416 |
|
---|
1417 | # 1.
|
---|
1418 | # Read the vocabulary file
|
---|
1419 | open(V, "<$vocabfile")
|
---|
1420 | || die "Cannot open $vocabfile: $!";
|
---|
1421 | my @symbol;
|
---|
1422 | my $i = 1;
|
---|
1423 | while(<V>) {
|
---|
1424 | chomp;
|
---|
1425 | $symbol[$i++] = $_;
|
---|
1426 | }
|
---|
1427 | close V;
|
---|
1428 |
|
---|
1429 | # 2.
|
---|
1430 | # Translate phrases.3 to MGPP input files
|
---|
1431 | my ($key, $text, $word, $isThesaurus, $line);
|
---|
1432 | my @fields;
|
---|
1433 | my $linenumber = 0;
|
---|
1434 |
|
---|
1435 | open(IN, "<$infile");
|
---|
1436 | open(DATA, ">$datafile");
|
---|
1437 | open(WORD, ">$wordfile");
|
---|
1438 |
|
---|
1439 | # Save the phrases in a separate text file
|
---|
1440 | if ($savephrases) {
|
---|
1441 | print $out "Saving phrases in $savephrases\n" if ($verbosity);
|
---|
1442 | open(SAVE, ">$savephrases");
|
---|
1443 | }
|
---|
1444 |
|
---|
1445 | while(<IN>) {
|
---|
1446 |
|
---|
1447 | # read the line
|
---|
1448 | chomp;
|
---|
1449 | $line = $_;
|
---|
1450 | @fields = split(/:/, $line);
|
---|
1451 |
|
---|
1452 | # get a phrase number for this line
|
---|
1453 | $key = shift @fields;
|
---|
1454 |
|
---|
1455 | # restore the text of the phrase
|
---|
1456 | $text = shift @fields;
|
---|
1457 | $text =~ s/s(\d+)/$symbol[$1]/g;
|
---|
1458 | if ($text =~ / /) {
|
---|
1459 | $word = "";
|
---|
1460 | } elsif ($text ne 'untranslated') {
|
---|
1461 | $word = $text;
|
---|
1462 | }
|
---|
1463 |
|
---|
1464 | # output the phrase data
|
---|
1465 | print DATA "<Document>";
|
---|
1466 | print DATA "$key:$text:", join(":", @fields), ":\n";
|
---|
1467 |
|
---|
1468 | # output the word index search data
|
---|
1469 | print WORD "<Document>$word\n";
|
---|
1470 |
|
---|
1471 | # output the phrases to a text file
|
---|
1472 | if ($savephrases) {
|
---|
1473 | if ((scalar @fields) == 7) {
|
---|
1474 | $isThesaurus = 1;
|
---|
1475 | } else {
|
---|
1476 | $isThesaurus = 0;
|
---|
1477 | }
|
---|
1478 | print SAVE $fields[0], "\t", $fields[2], "\t$isThesaurus\t$text\n";
|
---|
1479 | }
|
---|
1480 | }
|
---|
1481 | close IN;
|
---|
1482 | close WORD;
|
---|
1483 | close DATA;
|
---|
1484 | close SAVE if ($savephrases);
|
---|
1485 |
|
---|
1486 | }
|
---|
1487 |
|
---|
1488 |
|
---|
1489 |
|
---|
1490 | # sort routines used to renumber phrases
|
---|
1491 |
|
---|
1492 | sub numerically { $a <=> $b }
|
---|
1493 |
|
---|
1494 | sub by_doc_frequency {
|
---|
1495 | my $fa = 1;
|
---|
1496 | if ($a =~ /,/) {
|
---|
1497 | $fa = $a;
|
---|
1498 | $fa =~ s/\d+,//;
|
---|
1499 | }
|
---|
1500 | my $fb = 1;
|
---|
1501 | if ($b =~ /,/) {
|
---|
1502 | $fb = $b;
|
---|
1503 | $fb =~ s/\d+,//;
|
---|
1504 | }
|
---|
1505 |
|
---|
1506 | return ($fb <=> $fa);
|
---|
1507 | }
|
---|
1508 |
|
---|
1509 | 1;
|
---|