Hello, I am editing the WordNet http://wordnet.princeton.edu/  dictionary files 
to add my own words into it. The database file of WordNet look like normal text 
file and I am editing it with vim, but whenever I add a word it causes the perl 
"seek" function to work incorrecly.  

Here are the first *TWO* lines of data.noun file with the parts that I have 
added on the first line, "entity2 0"
00001740 03 n 02 entity 0 entity2 0 003 ~ 00001930 n 0000 ~ 00002137 n
0000 ~ 04424418 n 0000 | that which is perceived or known or inferred
to have its own distinct existence (living or nonliving)
00001930 03 n 01 physical_entity 0 007 @ 00001740 n 0000 ~ 00002452 n
0000 ~ 00002684 n 0000 ~ 00007347 n 0000 ~ 00020827 n 0000 ~ 00029677 n
0000 ~         14580597 n 0000 | an entity that has physical existence



Happen in
WordNet::QueryData module at 
http://search.cpan.org/~jrennie/WordNet-QueryData-1.47/QueryData.pm
WordNet::QueryData::getSense function , line 612 - 613

612: seek $fh, $offset, 0;
613: my $line = <$fh>;


# $fh is the filehandle to data.noun
#Perl debugger
DB<51> x $offset
0  00001930
# Here is the part that causes the seek function get the wrong data,
DB<48> x $line
0  'iving)  
#The $line suppose to be
00001930 03 n 01 physical_entity 0 007 @ 00001740 n 0000 ~ 00002452 n
0000 ~ 00002684 n 0000 ~ 00007347 n 0000 ~ 00020827 n 0000 ~ 00029677 n
0000 ~         14580597 n 0000 | an entity that has physical existence


With these perl code it's enough to cause such an error
use WordNet::QueryData;
my $wn = new WordNet::QueryData;
print $wn->querySense("entity#n#1","hypo");

(getSense) Internal error: offset=00001930 pos=n at 
/usr/local/lib/perl5/site_perl/5.10.0/WordNet/QueryData.pm line 622, <GEN8> 
line 2.


Is it because those files are not normal text file ? 
But according to them 
What is the format of the WordNet database?
The (ASCII) database format is well-documented. See WordNet documentation 
index, specifically WordNet man page: wndb.5WN.
I had spent more than 24 hours to solve this, but not still not clue, please 
guide me.
Thank you very much,

Regards,
William Kisman


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