NAME
    Lingua::JA::TermExtractor - Term Extractor

SYNOPSIS
      use Lingua::JA::TermExtractor;
      use utf8;
      use feature qw/say/;
      use Data::Printer;

      my $extractor = Lingua::JA::TermExtractor->new(
          api               => 'YahooPremium',
          appid             => $appid,
          fetch_df          => 1,
          Furl_HTTP         => { timeout => 3 },
          driver            => 'TokyoTyrant',
          df_file           => 'localhost:1978',
          pos1_filter       => [qw/非自立 代名詞 数 ナイ形容詞語幹 副詞可能 サ変接続/],
          term_length_min   => 2,
          tf_min            => 2,
          df_min            => 1_0000,
          df_max            => 1000_0000,
          ng_word           => [qw/編集 本人 自身 自分 たち さん/],
          fetch_unk_word_df => 0,
          concat_max        => 100,
      );

      p $extractor->extract($document)->dump;
      p $extractor->extract(\@documents)->dump;

      for my $result (@{ $extractor->extract(\@documents)->list(50) })
      {
          my ($word, $score) = each %{$result};

          say "$word: $score";
      }

DESCRIPTION
    Lingua::JA::TermExtractor is a term extractor. This extracts terms from
    a document or documents.

METHODS
  new( %config || \%config )
    Creates a new Lingua::JA::TermExtractor instance.

    The following configuration is used if you don't set %config.

      KEY                 DEFAULT VALUE
      -----------         ---------------
      k1                  2.0
      b                   0.75

      pos1_filter         [qw/非自立 代名詞 数 ナイ形容詞語幹 副詞可能 接尾/]
      pos2_filter         []
      pos3_filter         []
      ng_word             []
      term_length_min     2
      term_length_max     30
      concat_max          30
      tf_min              1
      df_min              0
      df_max              250_0000_0000
      fetch_unk_word_df   0
      db_auto             1

      idf_type            1
      api                 'Yahoo'
      appid               undef
      driver              'Storable'
      df_file             undef
      fetch_df            1
      expires_in          365
      documents           250_0000_0000
      Furl_HTTP           undef

    k1 => $value
        The weight of term frequency(TF).

    b => $value
        The weight of document length normalization.

    pos(1|2|3)_filter, ng_word, term_length_(min|max), concat_max, tf_min,
    df_(min|max), fetch_unk_word_df, db_auto
        See Lingua::JA::TFWebIDF.

    idf_type, api, appid, driver, df_file, fetch_df, expires_in, documents,
    Furl_HTTP
        See Lingua::JA::WebIDF.

  extract( $document || \@documents )
    Extracts terms from $document or \@documents. Word segmentation and POS
    tagging are done with MeCab.

  tfidf, tf
    See Lingua::JA::TFWebIDF.

  idf, df, purge, db_open, db_close
    See Lingua::JA::WebIDF.

AUTHOR
    pawa <pawapawa@cpan.org>

SEE ALSO
    Lingua::JA::WebIDF

    Lingua::JA::WebIDF::Driver::TokyoTyrant

    Lingua::JA::TFWebIDF

LICENSE
    This library is free software; you can redistribute it and/or modify it
    under the same terms as Perl itself.

