# File lib_core/rucy/document.rb, line 302
    def load
      @doc_map = Hash.new
      @filter_map = Hash.new
      @factory = DocumentFactory.new
      rucy_consts = Hash[*Rucy.constants.map{|n| [n, true] }.flatten]
      Dir.foreach(@mod_path) do |rb_name|
        path = File.join(@mod_path, rb_name)
        if ((File.file? path) && rb_name =~ /\.rb$/) then
          loader = SimpleLoader.new
          begin
            loader.load(path)
            for const_name in loader.constants
              next if (rucy_consts.include? const_name)
              case (const_name)
              when /Document$/
                @doc_map[const_name] = loader
                doc_builder = const_name + 'Builder'
                if (loader.const_defined? doc_builder) then
                  @factory.add_document(loader.const_get(doc_builder).instance)
                else
                  @factory.add_document(loader.const_get(const_name))
                end
              when /Filter$/
                @filter_map[const_name] = loader
                filter_builder = const_name + 'Builder'
                if (loader.const_defined? filter_builder) then
                  @factory.add_filter(loader.const_get(filter_builder).instance)
                else
                  @factory.add_filter(loader.const_get(const_name))
                end
              end
            end
          rescue StandardError, ScriptError
            @load_errors.push([ path, $! ])
          end
        end
      end
      nil
    end