RSS Atom JSON feed support

Feed

Property	RSS	Atom	JSON
title	title	title	title
description	description	description	description*
link	–	–	feed_url*
lastModified	lastBuildDate pubDate	–	–
items	item**	item**	[item]

Feed item

Property	RSS	Atom	JSON
identifier	guid	id	id
title	title	title	title*
description	description	summary	summary*
author	author	author name=“”	author*
itemURL	link	link rel=“alternate”	url*
lastModified	pubDate	published updated	date_published* date_modified*
attachments	enclosure	link rel=“enclosure”	[attachment]*

* Optional
** Multiple