NAME Text::MeCab - Alternate Interface To libmecab SYNOPSIS use Text::MeCab; my $mecab = Text::MeCab->new({ rcfile => $rcfile, dicdir => $dicdir, userdic => $userdic, lattice_level => $lattice_level, all_morphs => $all_morphs, output_format_type => $output_format_type, partial => $partial, node_format => $node_format, unk_format => $unk_format, bos_format => $bos_format, eos_format => $eos_format, input_buffer_size => $input_buffer_size, allocate_sentence => $allocate_sentence, nbest => $nbest, theta => $theta, }); for (my $node = $mecab->parse($text); $node; $node = $node->next) { # See perdoc for Text::MeCab::Node for list of methods print $node->surface, "\n"; } # use constants use Text::MeCab qw(:all); use Text::MeCab qw(MECAB_NOR_NODE); # want to use a command line arguments? my $mecab = Text::MeCab->new("--userdic=/foo/bar/baz", "-P"); # check what mecab version we compiled against? print "Compiled with ", &Text::MeCab::MECAB_VERSION, "\n"; DESCRIPTION libmecab (http://mecab.sourceforge.ne.jp) already has a perl interface built with it, so why a new module? I just feel that while a subtle difference, making the perl interface through a tied hash is just... weird. So Text::MeCab gives you a more natural, Perl-ish way to access libmecab! WARNING: Please note that this module is primarily targetted for libmecab >= 0.90, so if things seem to be broken and your libmecab version is below 0.90, then you might want to consider upgrading libmecab first. Text::MeCab AND SCOPING [NOTE: The memory management issue has been changed since 0.09] libmecab's default behavior is such that when you analyze a text and get a node back, that node is tied to the mecab "tagger" object that performed the analysis. Therefore, when that tagger is destroyed via mecab_destroy(), all nodes that are associated to it are freed as well. Text::MeCab defaults to the same behavior, so the following won't work: sub get_mecab_node { my $mecab = Text::MeCab->new; my $node = $mecab->parse($_[0]); return $node; } my $node = get_mecab_node($text); By the time get_mecab_node() returns, the Text::MeCab object is DESTROY'ed, and so is $node (actually, the object exists, but it will complain when you try to access the node's internals, because the C struct that was there has already been freed). In such cases, use the dclone() method. This will copy the *entire* node structure and create a new Text::MeCab::Node::Cloned instance. sub get_mecab_node { my $mecab = Text::MeCab->new; my $node = $mecab->parse($_[0]); return $node->dclone(); } The returned Text::MeCab::Node::Cloned object is exactly the same as Text::MeCab::Node object on the surface. It just uses a different but very similar C struct underneath. It is blessed into a different namespace only because we need to use a different memory management strategy. Do be aware of the memory issue. You WILL use up twice as much memory. Also please note that if you try the first example, accessing the node *WILL* result in a segfault. This is *NOT* a bug: it's a feature :) While it is possible to control the memory management such that accessing a field in a node that has already expired results in a legal croak(), we do not go to the length to ensure this, because it will result in a performance penalty. Just remember that unless you dclone() a node, then you are NOT allowed to access it when the original tagger goes out scope: { my $mecab = Text::MeCab->new; $node = $mecab->parse(...); } $node->surface; # segfault!!!! Always remember to dclone() before doing this! METHODS new HASHREF | LIST Creates a new Text::MeCab instance. You can either specify a hashref and use named parameters, or you can use the exact command line arguments that the mecab command accepts. Below is the list of accepted named options. See the man page for mecab for details about each option. rcfile dicdir lattice_level all_morphs output_format_type partial node_format unk_format bos_format eos_format input_buffer_size allocate_sentence nbest theta parse SCALAR Parses the given text via mecab, and returns a Text::MeCab::Node object. SEE ALSO http://mecab.sourceforge.ne.jp AUTHOR (c) 2006 Daisuke Maki All rights reserved.