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