example.rb

require "rss"
x = RSS::Rss::Channel::Item.new
=> #<RSS::Rss::Channel::Item:0x007fd29498dac8
 @author=nil,
 @category=[],
 @comments=nil,
 @content_encoded=nil,
 @converter=nil,
 @dc_contributor=[],
 @dc_coverage=[],
 @dc_creator=[],
 @dc_date=[],
 @dc_description=[],
 @dc_format=[],
 @dc_identifier=[],
 @dc_language=[],
 @dc_publisher=[],
 @dc_relation=[],
 @dc_rights=[],
 @dc_source=[],
[10] pry(main)> x.class
=> RSS::Rss::Channel::Item
[11] pry(main)> class RSS::Rss::Channel::Item
[11] pry(main)*   def pubDate
[11] pry(main)*     :default_pub_date
[11] pry(main)*   end
[11] pry(main)* end
=> nil
[12] pry(main)> x.pubDate
=> :default_pub_date