#!/usr/bin/env perl $|++; my $script_dir; BEGIN {$^W = 1; use Cwd qw/ abs_path /; use File::Basename; $script_dir = dirname(abs_path($0)); push @INC, $script_dir; } use strict; use utf8; binmode STDIN, ":utf8"; binmode STDOUT, ":utf8"; binmode STDERR, ":utf8"; my $debug = 0; ############ options: ### for all options: ### 0 means no split on that symbol ### 1 means split on that symbol in all cases. ### 2 means do not split in condition 1. ### n means do not split in any of the conditions in the set {1, 2, ..., n-1}. ### prefix ## for "#": #90 my $Split_On_SharpSign = 2; # 2: do not split on Num, e.g., "#90" ############## "infix" my $Split_On_Tilde = 2; # 2: do not split on Num, e.g., "12~13". my $Split_On_Circ = 2; # 2: do not split on Num, e.g, "2^3" ## for "&" my $Split_On_AndSign = 2; # 2: do not split on short Name, e.g., "AT&T". ## for hyphen: 1990-1992 my $Split_On_Dash = 2; ## 2: do not split on number, e.g., "22-23". my $Split_On_Underscore = 0; ## 0: do not split by underline ## for ":": 5:4 my $Split_On_Semicolon = 2; ## 2: don't split for num, e.g., "5:4" ########### suffix ## for percent sign: 5% my $Split_On_PercentSign = 1; ## 2: don't split num, e.g., 5% ############# others ## for slash: 1/4 my $Split_On_Slash = 2; ## 2: don't split on number, e.g., 1/4. my $Split_On_BackSlash = 0; ## 0: do not split on "\", e.g., \t ### for "$": US$120 my $Split_On_DollarSign = 2; ### 2: US$120 => "US$ 120" ### 1: US$120 => "US $ 120" ## for 's etc. my $Split_NAposT = 1; ## n't my $Split_AposS = 1; ## 's my $Split_AposM = 1; ## 'm my $Split_AposRE = 1; ## 're my $Split_AposVE = 1; ## 've my $Split_AposLL = 1; ## 'll my $Split_AposD = 1; ## 'd ### some patterns my $common_right_punc = '\x{0964}|\.|\,|\;|\!|:|\?|\"|\)|\]|\}|\>|\-'; #### step 1: read files my $workdir = $script_dir; my $dict_file = "$workdir/token_list"; my $word_patt_file = "$workdir/token_patterns"; open(my $dict_fp, "$dict_file") or die; binmode($dict_fp, ":utf8"); # read in the list of words that should not be segmented, ## e.g.,"I.B.M.", co-operation. my %dict_hash = (); my $dict_entry = 0; while(<$dict_fp>){ chomp; next if /^\s*$/; s/^\s+//; s/\s+$//; tr/A-Z/a-z/; $dict_hash{$_} = 1; $dict_entry ++; } open(my $patt_fp, "$word_patt_file") or die; binmode($patt_fp, ":utf8"); my @word_patts = (); my $word_patt_num = 0; while(<$patt_fp>){ chomp; next if /^\s*$/; s/^\s+//; s/\s+$//; s/^\/(.+)\/$/$1/; # remove / / around the pattern push(@word_patts, $_); $word_patt_num ++; } ###### step 2: process the input file my $orig_token_total = 0; my $deep_proc_token_total = 0; my $new_token_total = 0; while(){ chomp(); if(/^(\[b\s+|\]b|\]f|\[f\s+)/ || (/^\[[bf]$/) || (/^\s*$/) || /^//; $new_line =~ s/\s*<\s+(p|hl)\s+>/<$1>/; $new_line =~ s/\s*<\s+\/\s+(p|hl|DOC)\s+>/<\/$1>/; $new_line =~ s/<\s+\/\s+seg\s+>/<\/seg>/; if ($new_line =~ /^\s*<\s+DOC\s+/) { $new_line =~ s/\s+//g; $new_line =~ s/DOC/DOC /; $new_line =~ s/sys/ sys/; } if ($new_line =~ /^\s*<\s+(refset|srcset)\s+/) { $new_line =~ s/\s+//g; $new_line =~ s/(set|src|tgt|trg)/ $1/g; } chomp $new_line; print STDOUT "$new_line\n"; } ######################################################################## ### tokenize a line. sub proc_line { my @params = @_; my $param_num = scalar @params; if(($param_num < 1) || ($param_num > 3)){ die "wrong number of params for proc_line: $param_num\n"; } my $orig_line = $params[0]; $orig_line =~ s/^\s+//; $orig_line =~ s/\s+$//; my @parts = split(/\s+/, $orig_line); if($param_num >= 2){ my $orig_num_ptr = $params[1]; $$orig_num_ptr = scalar @parts; } my $new_line = ""; my $deep_proc_token = 0; foreach my $part (@parts){ my $flag = -1; $new_line .= proc_token($part, \$flag) . " "; $deep_proc_token += $flag; } if($param_num == 3){ my $deep_num_ptr = $params[2]; $$deep_num_ptr = $deep_proc_token; } return $new_line; } ## Tokenize a str that does not contain " ", return the new string ## The function handles the cases that the token needs not be segmented. ## for other cases, it calls deep_proc_token() sub proc_token { my @params = @_; my $param_num = scalar @params; if($param_num > 2){ die "proc_token: wrong number of params: $param_num\n"; } my $token = $params[0]; if(!defined($token)){ return ""; } my $deep_proc_flag; if($param_num == 2){ $deep_proc_flag = $params[1]; $$deep_proc_flag = 0; } if($debug){ print STDERR "pro_token:+$token+\n"; } ### step 0: it has only one char if(($token eq "") || ($token=~ /^.$/)){ ## print STDERR "see +$token+\n"; return $token; } ## step 1: check the most common case if($token =~ /^[a-z0-9\p{Cyrillic}\p{Greek}\p{Hebrew}\p{Han}\p{Arabic}\p{Devanagari}]+$/i){ #if($token =~ /^[a-z0-9\p{Cyrillic}\p{Greek}\p{Hebrew}\p{Han}\p{Arabic}]+$/i){ ### most common cases return $token; } ## step 2: check whether it is some NE entity ### 1.2.4.6 if($token =~ /^\d+(.\d+)+$/){ return $token; } ## 1,234,345.34 if($token =~ /^\d+(\.\d{3})*,\d+$/){ ## number return $token; } if($token =~ /^\d+(,\d{3})*\.\d+$/){ ## number return $token; } if($token =~ /^(@|#)[A-Za-z0-9_\p{Cyrillic}\p{Greek}\p{Hebrew}\p{Han}\p{Arabic}\p{Devanagari}]+.*$/){ ## twitter hashtag or address return proc_rightpunc($token); } if($token =~ /^[a-z0-9\_\-]+\@[a-z\d\_\-]+(\.[a-z\d\_\-]+)*(.*)$/i){ ### email address: xxx@yy.zz return proc_rightpunc($token); } if($token =~ /^(mailto|http|https|ftp|gopher|telnet|file)\:\/{0,2}([^\.]+)(\.(.+))*$/i){ ### URL: http://xx.yy.zz return proc_rightpunc($token); } if($token =~ /^(www)(\.(.+))+$/i){ ### www.yy.dd/land/ return proc_rightpunc($token); } if($token =~ /^(\w+\.)+(com|co|edu|org|gov|ly|cz|ru|eu)(\.[a-z]{2,3})?\:{0,2}(\/\S*)?$/i){ ### URL: upenn.edu/~xx return proc_rightpunc($token); } if($token =~ /^\(\d{3}\)\d{3}(\-\d{4})($common_right_punc)*$/){ ## only handle American phone numbers: e.g., (914)244-4567 return proc_rightpunc($token); } #my $t1 = '[\x{0600}-\x{06ff}a-z\d\_\.\-]'; my $t1 = '[a-z\d\_\-\.\p{Cyrillic}\p{Greek}\p{Hebrew}\p{Han}\p{Arabic}\p{Devanagari}]'; if($token =~ /^\/(($t1)+\/)+($t1)+\/?$/i){ ### /nls/p/.... return $token; } if($token =~ /^\\(($t1)+\\)+($t1)+\\?$/i){ ### \nls\p\.... return $token; } ## step 3: check the dictionary my $token_lc = $token; $token_lc =~ tr/A-Z/a-z/; if(defined($dict_hash{$token_lc})){ return $token; } ## step 4: check word_patterns my $i=1; foreach my $patt (@word_patts){ if($token_lc =~ /$patt/){ if($debug){ print STDERR "+$token+ match pattern $i: +$patt+\n"; } return $token; }else{ $i++; } } ## step 5: call deep tokenization if($param_num == 2){ $$deep_proc_flag = 1; } return deep_proc_token($token); } ### remove punct on the right side ### e.g., xxx@yy.zz, => xxx@yy.zz , sub proc_rightpunc { my ($token) = @_; $token =~ s/(($common_right_punc)+)$/ $1 /; if($token =~ /\s/){ return proc_line($token); }else{ return $token; } } ####################################### ### return the new token: ### types of punct: ## T1 (2): the punct is always a token by itself no matter where it ### appears: " ; ## T2 (15): the punct that can be a part of words made of puncts only. ## ` ! @ + = [ ] ( ) { } | < > ? ## T3 (15): the punct can be part of a word that contains [a-z\d] ## T3: ~ ^ & : , # * % - _ \ / . $ ' ## infix: ~ (12~13), ^ (2^3), & (AT&T), : , ## prefix: # (#9), * (*3), ## suffix: % (10%), ## infix+prefix: - (-5), _ (_foo), ## more than one position: \ / . $ ## Appos: 'm n't ... ## 1. separate by puncts in T1 ## 2. separate by puncts in T2 ## 3. deal with punct T3 one by one according to options ## 4. if the token remains unchanged after step 1-3, return the token ## $line contains at least 2 chars, and no space. sub deep_proc_token { my ($line) = @_; if($debug){ print STDERR "deep_proc_token: +$line+\n"; } ##### step 0: if it mades up of all puncts, remove one punct at a time. if($line !~ /[\p{Cyrillic}\p{Greek}\p{Hebrew}\p{Han}\p{Arabic}\p{Devanagari}a-zA-Z\d]/){ if($line =~ /^(\!+|\@+|\++|\=+|\*+|\<+|\>+|\|+|\?+|\x{0964}+|\.+|\-+|\_+|\&+)$/){ ## ++ @@@@ !!! .... return $line; } if($line =~ /^(.)(.+)$/){ my $t1 = $1; my $t2 = $2; return $t1 . " " . proc_token($t2); }else{ ### one char only print STDERR "deep_proc_token: this should not happen: +$line+\n"; return $line; } } ##### step 1: separate by punct T2 on the boundary my $t2 = '\`|\!|\@|\+|\=|\[|\]|\<|\>|\||\(|\)|\{|\}|\?|\"|;'; if($line =~ s/^(($t2)+)/$1 /){ return proc_line($line); } if($line =~ s/(($t2)+)$/ $1/){ return proc_line($line); } ## step 2: separate by punct T2 in any position if($line =~ s/(($t2)+)/ $1 /g){ return proc_line($line); } ##### step 3: deal with special puncts in T3. if($line =~ /^(\,+)(.+)$/){ my $t1 = $1; my $t2 = $2; return proc_token($t1) . " " . proc_token($t2); } if($line =~ /^(.*[^\,]+)(\,+)$/){ ## 19.3,,, => 19.3 ,,, my $t1 = $1; my $t2 = $2; return proc_token($t1) . " " . proc_token($t2); } ## remove the ending periods that follow number etc. if($line =~ /^(.*(\d|\~|\^|\&|\:|\,|\#|\*|\%|\-|\_|\/|\\|\$|\'))(\.+)$/){ ## 12~13. => 12~13 . my $t1 = $1; my $t3 = $3; return proc_token($t1) . " " . proc_token($t3); } ### deal with "$" if(($line =~ /\$/) && ($Split_On_DollarSign > 0)){ my $suc = 0; if($Split_On_DollarSign == 1){ ## split on all occasation $suc = ($line =~ s/(\$+)/ $1 /g); }else{ ## split only between $ and number $suc = ($line =~ s/(\$+)(\d)/$1 $2/g); } if($suc){ return proc_line($line); } } ## deal with "#" if(($line =~ /\#/) && ($Split_On_SharpSign > 0)){ my $suc = 0; if($Split_On_SharpSign >= 2){ ### keep #50 as a token $suc = ($line =~ s/(\#+)(\D)/ $1 $2/gi); }else{ $suc = ($line =~ s/(\#+)/ $1 /gi); } if($suc){ return proc_line($line); } } ## deal with ' if($line =~ /\'/){ my $suc = ($line =~ s/([^\'])([\']+)$/$1 $2/g); ## xxx'' => xxx '' ### deal with ': e.g., 's, 't, 'm, 'll, 're, 've, n't ## 'there => ' there '98 => the same $suc += ($line =~ s/^(\'+)([a-z\p{Cyrillic}\p{Greek}\p{Hebrew}\p{Han}\p{Arabic}\p{Devanagari}]+)/ $1 $2/gi); ## note that \' and \. could interact: e.g., U.S.'s; 're. if($Split_NAposT && ($line =~ /^(.*[a-z]+)(n\'t)([\.]*)$/i)){ ## doesn't => does n't my $t1 = $1; my $t2 = $2; my $t3 = $3; return proc_token($t1) . " " . $t2 . " " . proc_token($t3); } ## 's, 't, 'm, 'll, 're, 've: they've => they 've ## 1950's => 1950 's Co.'s => Co. 's if($Split_AposS && ($line =~ /^(.+)(\'s)(\W*)$/i)){ my $t1 = $1; my $t2 = $2; my $t3 = $3; return proc_token($t1) . " " . $t2 . " " . proc_token($t3); } if($Split_AposM && ($line =~ /^(.*[a-z]+)(\'m)(\.*)$/i)){ my $t1 = $1; my $t2 = $2; my $t3 = $3; return proc_token($t1) . " " . $t2 . " " . proc_token($t3); } if($Split_AposRE && ($line =~ /^(.*[a-z]+)(\'re)(\.*)$/i)){ my $t1 = $1; my $t2 = $2; my $t3 = $3; return proc_token($t1) . " " . $t2 . " " . proc_token($t3); } if($Split_AposVE && ($line =~ /^(.*[a-z]+)(\'ve)(\.*)$/i)){ my $t1 = $1; my $t2 = $2; my $t3 = $3; return proc_token($t1) . " " . $t2 . " " . proc_token($t3); } if($Split_AposLL && ($line =~ /^(.*[a-z]+)(\'ll)(\.*)$/i)){ my $t1 = $1; my $t2 = $2; my $t3 = $3; return proc_token($t1) . " " . $t2 . " " . proc_token($t3); } if($Split_AposD && ($line =~ /^(.*[a-z]+)(\'d)(\.*)$/i)){ my $t1 = $1; my $t2 = $2; my $t3 = $3; return proc_token($t1) . " " . $t2 . " " . proc_token($t3); } if($suc){ return proc_line($line); } } ## deal with "~" if(($line =~ /\~/) && ($Split_On_Tilde > 0)){ my $suc = 0; if($Split_On_Tilde >= 2){ ## keep 12~13 as one token $suc += ($line =~ s/(\D)(\~+)/$1 $2 /g); $suc += ($line =~ s/(\~+)(\D)/ $1 $2/g); $suc += ($line =~ s/^(\~+)(\d)/$1 $2/g); $suc += ($line =~ s/(\d)(\~+)$/$1 $2/g); }else{ $suc += ($line =~ s/(\~+)/ $1 /g); } if($suc){ return proc_line($line); } } ## deal with "^" if(($line =~ /\^/) && ($Split_On_Circ > 0)){ my $suc = 0; if($Split_On_Circ >= 2){ ## keep 12~13 as one token $suc += ($line =~ s/(\D)(\^+)/$1 $2 /g); $suc += ($line =~ s/(\^+)(\D)/ $1 $2/g); }else{ $suc = ($line =~ s/(\^+)/ $1 /g); } if($suc){ return proc_line($line); } } ## deal with ":" if(($line =~ /\:/) && ($Split_On_Semicolon > 0)){ ## 2: => 2 : my $suc = ($line =~ s/^(\:+)/$1 /); $suc += ($line =~ s/(\:+)$/ $1/); if($Split_On_Semicolon >= 2){ ## keep 5:4 as one token $suc += ($line =~ s/(\D)(\:+)/$1 $2 /g); $suc += ($line =~ s/(\:+)(\D)/ $1 $2/g); }else{ $suc += ($line =~ s/(\:+)/ $1 /g); } if($suc){ return proc_line($line); } } ### deal with hyphen: 1992-1993. 21st-24th if(($line =~ /\-/) && ($Split_On_Dash > 0)){ my $suc = ($line =~ s/(\-{2,})/ $1 /g); if($Split_On_Dash >= 2){ ## keep 1992-1993 as one token $suc += ($line =~ s/(\D)(\-+)/$1 $2 /g); $suc += ($line =~ s/(\-+)(\D)/ $1 $2/g); }else{ ### always split on "-" $suc += ($line =~ s/([\-]+)/ $1 /g); } if($suc){ return proc_line($line); } } ## deal with "_" if(($line =~ /\_/) && ($Split_On_Underscore > 0)){ ### always split on "-" if($line =~ s/([\_]+)/ $1 /g){ return proc_line($line); } } ## deal with "%" if(($line =~ /\%/) && ($Split_On_PercentSign > 0)){ my $suc = 0; if($Split_On_PercentSign >= 2){ $suc += ($line =~ s/(\D)(\%+)/$1 $2/g); }else{ $suc += ($line =~ s/(\%+)/ $1 /g); } if($suc){ return proc_line($line); } } ### deal with "/": 4/5 if(($line =~ /\//) && ($Split_On_Slash > 0)){ my $suc = 0; if($Split_On_Slash >= 2){ $suc += ($line =~ s/(\D)(\/+)/$1 $2 /g); $suc += ($line =~ s/(\/+)(\D)/ $1 $2/g); }else{ $suc += ($line =~ s/(\/+)/ $1 /g); } if($suc){ return proc_line($line); } } ### deal with comma: 123,456 if($line =~ /\,/){ my $suc = 0; $suc += ($line =~ s/([^\d]),/$1 , /g); ## xxx, 1923 => xxx , 1923 $suc += ($line =~ s/\,\s*([^\d])/ , $1/g); ## 1923, xxx => 1923 , xxx $suc += ($line =~ s/,([\d]{1,2}[^\d])/ , $1/g); ## 1,23 => 1 , 23 $suc += ($line =~ s/,([\d]{4,}[^\d])/ , $1/g); ## 1,2345 => 1 , 2345 $suc += ($line =~ s/,([\d]{1,2})$/ , $1/g); ## 1,23 => 1 , 23 $suc += ($line =~ s/,([\d]{4,})$/ , $1/g); ## 1,2345 => 1 , 2345 if($suc){ return proc_line($line); } } ## deal with "&" if(($line =~ /\&/) && ($Split_On_AndSign > 0)){ my $suc = 0; if($Split_On_AndSign >= 2){ $suc += ($line =~ s/([a-z]{3,})(\&+)/$1 $2 /gi); $suc += ($line =~ s/(\&+)([a-z]{3,})/ $1 $2/gi); }else{ $suc += ($line =~ s/(\&+)/ $1 /g); } if($suc){ return proc_line($line); } } ## deal with period if($line =~ /\./){ if($line =~ /^(([\+|\-])*(\d+\,)*\d*\.\d+\%*)$/){ ### numbers: 3.5 return $line; } if($line =~ /^(([a-z]\.)+)(\.*)$/i){ ## I.B.M. my $t1 = $1; my $t3 = $3; return $t1 . " ". proc_token($t3); } ## Feb.. => Feb. . if($line =~ /^(.*[^\.])(\.)(\.*)$/){ my $p1 = $1; my $p2 = $2; my $p3 = $3; my $p1_lc = $p1; $p1_lc =~ tr/A-Z/a-z/; if(defined($dict_hash{$p1_lc . $p2})){ ## Dec.. => Dec. . return $p1 . $p2 . " " . proc_token($p3); }elsif(defined($dict_hash{$p1_lc})){ return $p1 . " " . proc_token($p2 . $p3); }else{ ## this. => this . return proc_token($p1) . " " . proc_token($p2 . $p3); } } if($line =~ s/(\.+)(.+)/$1 $2/g){ return proc_line($line); } } ## no pattern applies return $line; }