david-mccullars/text_rank

module TextRank
  ##
  # Rank filters are post-process filters which can filter, enhance, or modify
  # the results of the PageRank algorithm.  A common use case is to collapse highly
  # ranked tokens which are found to be adjacent in the original text.  Other
  # filters might modify the PageRank scores with some sort of external modifier.
  # Another use might be to remove collapsed tokens which are not desired (since
  # token filters only operate on a single, non-collapsed token).
  #
  # Rank filters are applied as a chain, so care should be taken to use them
  # in the desired order.
  ##
  module RankFilter

    autoload :CollapseAdjacent,     'text_rank/rank_filter/collapse_adjacent'
    autoload :NormalizeProbability, 'text_rank/rank_filter/normalize_probability'
    autoload :NormalizeUnitVector,  'text_rank/rank_filter/normalize_unit_vector'
    autoload :SortByValue,          'text_rank/rank_filter/sort_by_value'

  end
end