item is a dictionary with 15 initial entries: result of the function to_unicode called with an argument title for 'title',
item = { 'title' : to_unicode ( title ) , 'link' : iri_to_uri ( link ) , 'description' : to_unicode ( description ) , 'author_email' : to_unicode ( author_email ) , 'author_name' : to_unicode ( author_name ) , 'author_link' : iri_to_uri ( author_link ) , 'pubdate' : pubdate , 'updateddate' : updateddate , 'comments' : to_unicode ( comments ) , 'unique_id' : to_unicode ( unique_id ) , 'unique_id_is_permalink' : unique_id_is_permalink , 'enclosure' : enclosure , 'categories' : categories or ( ) , 'item_copyright' : to_unicode ( item_copyright ) , 'ttl' : ttl , }