Feedjira::Feed.add_common_feed_element('_feed_id_')
Feedjira::Feed.add_common_feed_entry_element('_public_id_')
Feedjira::Feed.add_common_feed_entry_element('_old_public_id_')
Feedjira::Feed.add_common_feed_entry_element('_data_')
Feedjira::Feed.add_common_feed_entry_element('content')
Feedjira::Feed.add_common_feed_entry_element('self_url')

Feedjira::Parser::Atom.preprocess_xml = true
Feedjira::Parser::AtomFeedBurner.preprocess_xml = true