The RSS Object Protocol allows representation of an item from either an RSS feed or an atom feed for viewing by the user. Items from the feed are in XML format. This protocol enables a client to convert the XML of an RSS item, described in [RSS2.0], or an atom entry, described in [RFC4287], to properties on an RSS object. In addition to the XML conversion, the entire XML content of the RSS item or atom entry is saved in its own property on the RSS object.
The RSS Object Protocol extends the Message and Attachment Object Protocol in that it defines new properties on a Message object and adds constraints to the existing properties of a Message object. For information about the Message and Attachment Object Protocol, see [MS-OXCMSG].