# File r4tw.rb, line 440
  def plugin_meta(slice=nil)
    # see http://www.tiddlywiki.com/#ExamplePlugin

    if not @plugin_meta
      meta = %w[Name Description Version Date Source Author License CoreVersion Browser]
      @plugin_meta = get_slices.reject{|k,v| not meta.include?(k)}
    end
    if slice
      @plugin_meta[slice]
    else
      @plugin_meta
    end
  end