The "feed" element has the following sub-elements defined:

• <author> - Specifying the personal information about an author of the contents provided in this feed. A feed element may have zero, one or more author sub-elements.
• <category> - Specifying the category information of the contents provided in this feed. A feed element may have zero, one or more category sub-elements.
• <CONTRIBUTOR> - Specifying the personal information about a contributor of the contents provided in this feed. A feed element may have zero, one or more contributor sub-elements.
• <generator> - Specifying the information about the software used to generate this feed. A feed element may have zero or one generator sub-element.
• <icon> - Specifying the URL location of an icon image that identifies this feed. A feed element may have zero or one icon sub-element.
• <logo> - Specifying the URL location of an logo image that identifies this feed. A feed element may have zero or one logo sub-element.
• <id> - Specifying a URI that universally and uniquely identifies this feed. A feed element must exactly one id sub-element.
• <link> - Specifying a URL location of a Web page as a reference to this feed. A feed element may have zero, one or more link sub-elements. However, at least one link sub-element with REL="self" is recommended.
• <rights> - Specifying the information about the copyrights for this feed. A feed element may have zero or one rights sub-element.
• <subtitle> - Specifying a description or a subtitle for this feed. A feed element may have zero or one subtitle sub-element.
• <TITLE> - Specifying a title for this feed. A feed element must have exactly one title sub-element.
• <updated> - Specifying a TIME stamp of when this feed was updated. A feed element must have exactly one updated sub-element.
• <entry> - Specifying an entry of a feed. A feed element must have one or more entry sub-elements.

The "feed" element has the following sub-elements defined: