# File lib/kwartz/converter.rb, line 629
    def initialize(rulesets=[], properties={})
      @ruleset_table = {}
      rulesets.each { |ruleset| _register_ruleset(ruleset) }
      @elem_info_table = {}
      @delspan = properties.fetch(:delspan, Config::PROPERTY_DELSPAN)  # delete dummy <span> tag or not
      @odd     = properties.fetch(:odd,     Config::PROPERTY_ODD)      # "'odd'"
      @even    = properties.fetch(:even,    Config::PROPERTY_EVEN)     # "'even'"
    end