File size: 20,032 Bytes
22e4ecd |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 |
#!/usr/bin/env perl
# Reads a CoNLL-U file and tries to fix certain simple errors that would make the file invalid; writes the fixed file to STDOUT.
# Can be used to make a parser output valid.
# * Converts Unicode to the NFC normalized form (i.e., canonical decomposition followed by canonical composition).
# * Makes sure that all sentences have a unique sentence id.
# * Makes sure that all sentences have the full text comment and that it matches the SpaceAfter=No annotations (but if both exist in the input and they don't match, the script gives up).
# Usage: perl conllu-quick-fix.pl < input.conllu > fixed.conllu
# Copyright © 2019, 2020 Dan Zeman <zeman@ufal.mff.cuni.cz>
# License: GNU GPL
use utf8;
use open ':utf8';
binmode(STDIN, ':utf8');
binmode(STDOUT, ':utf8');
binmode(STDERR, ':utf8');
use Unicode::Normalize;
use Getopt::Long;
my $connect_to_root = 0;
GetOptions
(
'connect-to-root' => \$connect_to_root
);
my @sentence = ();
my $isent = 0;
while(<>)
{
push(@sentence, NFC($_));
if(m/^\s*$/)
{
process_sentence(@sentence);
@sentence = ();
}
}
#------------------------------------------------------------------------------
# Once a sentence has been read, processes it and prints it.
#------------------------------------------------------------------------------
sub process_sentence
{
$isent++; # global counter
my @sentence = @_;
my $sentid;
my $text;
my $resttext;
my $collected_text = '';
my $mwtto;
foreach my $line (@sentence)
{
$line =~ s/\r?\n$//;
if($line =~ m/^\#\s*sent_id\s*=\s*(\S+)$/)
{
$sentid = $1;
}
elsif($line =~ m/^\#\s*text\s*=\s*(.+)$/)
{
$text = $1;
$resttext = $text;
}
# All node/token lines must have exactly ten columns.
if($line =~ m/^\d/)
{
my @f = split(/\t/, $line);
while(scalar(@f)<10)
{
push(@f, '_');
}
splice(@f, 10);
# Now check the contents of the columns.
$f[2] = fix_lemma($f[0], $f[2]);
$f[3] = fix_upos($f[0], $f[3]);
$f[4] = fix_xpos($f[0], $f[4]);
$f[5] = fix_feats($f[0], $f[5]);
($f[6], $f[7]) = fix_head_deprel($f[0], $f[6], $f[7]);
$f[8] = fix_deps($f[0], $f[8]);
$line = join("\t", @f);
}
if($line =~ m/^\d+-(\d+)\t/)
{
$mwtto = $1;
my @f = split(/\t/, $line);
# Collect text from FORM. We will use it if there was no # text attribute.
my @misc = split(/\|/, $f[9]);
$collected_text .= $f[1];
# If there was a # text attribute, we will check and fix SpaceAfter=No instead.
if(defined($resttext))
{
my $l = length($f[1]);
if($f[1] eq substr($resttext, 0, $l))
{
$resttext = substr($resttext, $l);
# Now check SpaceAfter=No against the resttext. Exception: end of sentence cannot be verified.
unless($resttext eq '')
{
if($resttext =~ s/^\s+//)
{
# We just removed leading space(s) from $resttext. There must not be SpaceAfter=No in MISC.
@misc = grep {!m/^SpaceAfter=No$/} (@misc);
if(scalar(@misc) == 0)
{
push(@misc, '_');
}
}
else
{
# No spaces follow the form in $resttext. There must be SpaceAfter=No in MISC.
if(scalar(@misc) == 1 && $misc[0] eq '_')
{
$misc[0] = 'SpaceAfter=No';
}
elsif(!grep {m/^SpaceAfter=No$/} (@misc))
{
push(@misc, 'SpaceAfter=No');
}
}
}
}
else
{
print STDERR ("WARNING: sentence text comment exists and the form '$f[1]' does not match the rest of the text '$resttext'; giving up.\n");
$resttext = undef;
}
}
unless(grep {m/^SpaceAfter=No$/} (@misc))
{
$collected_text .= ' ';
}
$f[9] = join('|', @misc);
$line = join("\t", @f);
}
# Normal nodes (they may or may not be part of a multi-word token).
elsif($line =~ m/^\d+\t/)
{
my @f = split(/\t/, $line);
unless(defined($mwtto) && $f[0]<=$mwtto)
{
# Collect text from FORM. We will use it if there was no # text attribute.
my @misc = split(/\|/, $f[9]);
$collected_text .= $f[1];
# If there was a # text attribute, we will check and fix SpaceAfter=No instead.
if(defined($resttext))
{
my $l = length($f[1]);
if($f[1] eq substr($resttext, 0, $l))
{
$resttext = substr($resttext, $l);
# Now check SpaceAfter=No against the resttext. Exception: end of sentence cannot be verified.
unless($resttext eq '')
{
if($resttext =~ s/^\s+//)
{
# We just removed leading space(s) from $resttext. There must not be SpaceAfter=No in MISC.
@misc = grep {!m/^SpaceAfter=No$/} (@misc);
if(scalar(@misc) == 0)
{
push(@misc, '_');
}
}
else
{
# No spaces follow the form in $resttext. There must be SpaceAfter=No in MISC.
if(scalar(@misc) == 1 && $misc[0] eq '_')
{
$misc[0] = 'SpaceAfter=No';
}
elsif(!grep {m/^SpaceAfter=No$/} (@misc))
{
push(@misc, 'SpaceAfter=No');
}
}
}
}
else
{
print STDERR ("WARNING: sentence text comment exists and the form '$f[1]' does not match the rest of the text '$resttext'; giving up.\n");
$resttext = undef;
}
}
unless(grep {m/^SpaceAfter=No$/} (@misc))
{
$collected_text .= ' ';
}
$f[9] = join('|', @misc);
}
else # MISC of words within a multi-word token must not contain SpaceAfter=No
{
my @misc = split(/\|/, $f[9]);
@misc = grep {!m/^SpaceAfter=No$/} (@misc);
if(scalar(@misc) == 0)
{
push(@misc, '_');
}
$f[9] = join('|', @misc);
}
$line = join("\t", @f);
}
$line .= "\n";
}
# Generate sentence text comment if it is not present.
if(!defined($text))
{
$collected_text =~ s/\s+$//;
unshift(@sentence, "\# text = $collected_text\n");
}
# Generate sentence id if it is not present.
if(!defined($sentid))
{
unshift(@sentence, "\# sent_id = $isent\n");
}
# Optionally (with the --connect-to-root switch) add 0:root enhanced relations
# untill all nodes are reachable from 0.
if($connect_to_root)
{
@sentence = make_all_nodes_reachable(@sentence);
}
# Print the fixed sentence.
print(join('', @sentence));
}
#------------------------------------------------------------------------------
# Makes sure that lemma is valid.
#------------------------------------------------------------------------------
sub fix_lemma
{
my $id = shift;
my $lemma = shift;
# Multi-word token must have the lemma empty.
if($id =~ m/^\d+-\d+$/)
{
return '_';
}
# Empty node can have the lemma empty but it is not required.
if($id =~ m/^\d+\.\d+$/ && $lemma eq '_')
{
return $lemma;
}
# Normal nodes and empty nodes with non-empty lemmas.
# Make sure that LEMMA does not contain leading or trailing spaces.
$lemma =~ s/^\s+//;
$lemma =~ s/\s+$//;
$lemma = '_' if($lemma eq '');
return $lemma;
}
#------------------------------------------------------------------------------
# Makes sure that UPOS is valid.
#------------------------------------------------------------------------------
sub fix_upos
{
my $id = shift;
my $upos = shift;
# Multi-word token must have the UPOS empty.
if($id =~ m/^\d+-\d+$/)
{
return '_';
}
# Empty node can have the UPOS empty but it is not required.
if($id =~ m/^\d+\.\d+$/ && $upos eq '_')
{
return $upos;
}
# Make sure that UPOS is from the prescribed inventory.
if($upos !~ m/^(NOUN|PROPN|PRON|ADJ|DET|NUM|VERB|AUX|ADV|ADP|SCONJ|CCONJ|PART|INTJ|SYM|PUNCT|X)$/)
{
$upos = 'X';
}
return $upos;
}
#------------------------------------------------------------------------------
# Makes sure that XPOS is valid.
#------------------------------------------------------------------------------
sub fix_xpos
{
my $id = shift;
my $xpos = shift;
# Multi-word token must have the XPOS empty.
if($id =~ m/^\d+-\d+$/)
{
return '_';
}
# Empty node can have the XPOS empty but it is not required.
if($id =~ m/^\d+\.\d+$/ && $xpos eq '_')
{
return $xpos;
}
# Normal nodes and empty nodes with non-empty XPOS.
# Make sure that XPOS does not contain leading or trailing spaces.
$xpos =~ s/^\s+//;
$xpos =~ s/\s+$//;
$xpos = '_' if($xpos eq '');
return $xpos;
}
#------------------------------------------------------------------------------
# Makes sure that FEATS is valid.
#------------------------------------------------------------------------------
sub fix_feats
{
my $id = shift;
my $feats = shift;
# Multi-word token must have the FEATS empty.
if($id =~ m/^\d+-\d+$/)
{
return '_';
}
# Empty node can have the FEATS empty but it is not required.
if($id =~ m/^\d+\.\d+$/ && $feats eq '_')
{
return $feats;
}
# Normal nodes and empty nodes with non-empty FEATS.
# Make sure that FEATS is either '_' or it follows the prescribed pattern.
if($feats ne '_')
{
my @feats = split(/\|/, $feats);
# Each element must be a name=value pair.
# Feature names start with [A-Z] and contain [A-Za-z].
# Same for feature values, but [0-9] is also allowed there, and comma (',') may separate multi-values.
# Feature names can additionally contain square brackets with layer ("[psor]").
foreach my $fv (@feats)
{
my ($f, $v);
if($fv =~ m/^(.+)=(.+)$/)
{
$f = $1;
$v = $2;
}
else
{
$f = $fv;
$v = 'Yes';
}
$f =~ s/[^A-Za-z\[\]]//g;
$f =~ s/^(.)/\u\1/;
$f = 'X'.$f if($f !~ m/^[A-Z]/);
$v =~ s/[^A-Za-z0-9,]//g;
$v =~ s/^(.)/\u\1/;
$v = 'X'.$v if($v !~ m/^[A-Z0-9]/);
$fv = "$f=$v";
}
@feats = sort {lc($a) cmp lc($b)} (@feats);
$feats = join('|', @feats);
}
return $feats;
}
#------------------------------------------------------------------------------
# Makes sure that HEAD and DEPREL are valid.
#------------------------------------------------------------------------------
sub fix_head_deprel
{
my $id = shift;
my $head = shift;
my $deprel = shift;
# Multi-word tokens and empty nodes must have HEAD and DEPREL empty.
if($id =~ m/^\d+(-|\.)\d+$/)
{
return ('_', '_');
}
# Make sure that HEAD is numeric and DEPREL is not empty.
if($head !~ m/^\d+$/)
{
# We will attach node 1 to node 0, and all other nodes to 1.
# This will produce a valid tree if we apply it to all words,
# i.e., none of them had a valid parent before. Otherwise, it
# may not work as we may be introducing cycles!
if($id == 1)
{
$head = 0;
$deprel = 'root';
}
else
{
$head = 1;
if($deprel eq '_' || $deprel eq '')
{
$deprel = 'dep';
}
}
}
# Make sure that DEPREL contains only allowed strings (but no language-specific list is checked).
my $udeprels = 'nsubj|obj|iobj|csubj|ccomp|xcomp|obl|vocative|expl|dislocated|advcl|advmod|discourse|aux|cop|mark|nmod|appos|nummod|acl|amod|det|clf|case|conj|cc|fixed|flat|compound|list|parataxis|orphan|goeswith|reparandum|punct|root|dep';
if($deprel =~ m/^root(:|$)/ && $head != 0)
{
$deprel = 'dep';
}
if($deprel !~ m/^root(:|$)/ && $head == 0)
{
$deprel = 'root';
}
if($deprel !~ m/^($udeprels)(:[a-z]+)?$/)
{
# First attempt: remove the subtype.
$deprel =~ s/:.*//;
}
if($deprel !~ m/^($udeprels)(:[a-z]+)?$/)
{
# Second attempt: take 'dep'.
$deprel = 'dep';
}
return ($head, $deprel);
}
#------------------------------------------------------------------------------
# Makes sure that DEPS is valid.
#------------------------------------------------------------------------------
sub fix_deps
{
my $id = shift;
my $deps = shift;
# Multi-word tokens must have DEPS empty.
if($id =~ m/^\d+-\d+$/)
{
return '_';
}
# Empty DEPS is OK. But if not empty, then certain rules must be followed.
unless($deps eq '_')
{
my @deps = split(/\|/, $deps);
# Remove self-loops.
@deps = grep {my $h; if(m/^(\d+(?:\.\d+)?):/) {$h = $1;} defined($h) && $h!=$id} (@deps);
if(scalar(@deps)==0)
{
# DEPS was not empty, so there is an enhanced graph and we should not make DEPS empty now.
push(@deps, '0:root');
}
# Make sure that the deps do not contain disallowed characters.
foreach my $dep (@deps)
{
my ($h, $d);
if($dep =~ m/^(\d+(?:\.\d+)?):(.+)$/)
{
$h = $1;
$d = $2;
}
else
{
$h = 1;
$d = $dep;
}
if($d !~ m/^[a-z]+(:[a-z]+)?(:[\p{Ll}\p{Lm}\p{Lo}\p{M}]+(_[\p{Ll}\p{Lm}\p{Lo}\p{M}]+)*)?(:[a-z]+)?$/)
{
# First attempt: just lowercase and remove strange characters.
$d = lc($d);
$d =~ s/[^:_a-z\p{Ll}\p{Lm}\p{Lo}\p{M}]//g;
}
if($d !~ m/^[a-z]+(:[a-z]+)?(:[\p{Ll}\p{Lm}\p{Lo}\p{M}]+(_[\p{Ll}\p{Lm}\p{Lo}\p{M}]+)*)?(:[a-z]+)?$/)
{
# Second attempt: everything after the first colon is simply 'extra'.
$d =~ s/^([^:]*):.*$/$1:extra/;
}
if($d !~ m/^[a-z]+(:[a-z]+)?(:[\p{Ll}\p{Lm}\p{Lo}\p{M}]+(_[\p{Ll}\p{Lm}\p{Lo}\p{M}]+)*)?(:[a-z]+)?$/)
{
# Last attempt: just 'dep'.
$d = 'dep';
}
# Finally, if $h is 0, then $d must be root; and if $h is not 0, then $d must not be root.
if($h==0 && $d !~ m/^root(:|$)/)
{
$d = 'root';
}
if($h!=0 && $d =~ m/^root(:|$)/)
{
$d = 'dep';
}
$dep = "$h:$d";
}
# Remove duplicates from @deps.
my %deps; map {$deps{$_}++} (@deps);
@deps = keys(%deps);
@deps = sort
{
my @a = split(/:/, $a);
my @b = split(/:/, $b);
my $ah = shift(@a);
my $bh = shift(@b);
my $r = $ah <=> $bh;
unless($r)
{
my $ad = join(':', @a);
my $bd = join(':', @b);
$r = $ad cmp $bd;
}
$r
}
(@deps);
$deps = join('|', @deps);
}
return $deps;
}
#------------------------------------------------------------------------------
# For each node of the enhanced graph, finds the set of nodes from which the
# node is reachable, i.e., the set of its enhanced ancestors. If node 0 (the
# virtual root) is not among them, adds gradually 0:root relations until all
# nodes are reachable from the root.
#------------------------------------------------------------------------------
sub make_all_nodes_reachable
{
my @sentence = @_;
my @nodes = grep {m/^\d+(\.\d+)?\t/} (@sentence);
my %unreachable;
my %parents;
foreach my $node (@nodes)
{
my @f = split(/\t/, $node);
my $id = $f[0];
$unreachable{$id}++;
my $deps = $f[8];
my @nodeparents = map {m/^(.+):/; $1} (split(/\|/, $deps));
my %nodeparents; map {$nodeparents{$_}++} (@nodeparents);
@nodeparents = keys(%nodeparents);
$parents{$id} = \@nodeparents;
}
# Find nodes that are reachable from 0.
my %reachable;
$reachable{'0'}++;
my %attach_to_root; # nodes that will have to be attached to 0
while(1)
{
my @unreachable = sort(keys(%unreachable));
last if(scalar(@unreachable)==0);
my $found_new = 0;
foreach my $id (@unreachable)
{
foreach my $parent (@{$parents{$id}})
{
if($reachable{$parent})
{
$found_new++;
$reachable{$id}++;
delete($unreachable{$id});
last;
}
}
}
# If we cannot find a new way how to make an unreachable node reachable,
# try attaching the first unreachable node directly to the root.
# We will first try to attach to root the first node (by id, lexicographically).
# There might be better solutions, e.g., if the unreachable nodes form
# a component whose root is the last node (with highest id). But we are
# not trying to find the optimal solution. We just want to make the file
# valid.
@unreachable = sort(keys(%unreachable));
if(scalar(@unreachable)>0 && !$found_new)
{
my $node = shift(@unreachable);
$attach_to_root{$node}++;
$reachable{$node}++;
delete($unreachable{$node});
$found_new = 1;
}
}
# Now take the nodes that should be attached to the root and attach them there.
foreach my $line (@sentence)
{
if($line =~ m/^\d+(\.\d+)?\t/)
{
my @f = split(/\t/, $line);
if($attach_to_root{$f[0]})
{
my @deps = split(/\|/, $f[8]);
@deps = () if(scalar(@deps)==1 && $deps[0] eq '_');
unshift(@deps, '0:root');
$f[8] = join('|', @deps);
}
$line = join("\t", @f);
}
}
return @sentence;
}
|