What Are Sub-elements of the entry Element? - RSS FAQs - Atom Feed File Structure and Elements

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

• <author> - Specifying the personal information about an author of the contents provided in this feed entry. A feed element may have zero, one or more author sub-elements.
• <category> - Specifying the category information of the contents provided in this feed entry. A feed element may have zero, one or more category sub-elements.
• <content> - Specifying the content of this feed entry. A feed element may have zero, or one content sub-element.
• <contributor> - Specifying the personal information about a contributor of the contents provided in this feed entry. A feed element may have zero, one or more contributor sub-elements.
• <id> - Specifying a URI that universally and uniquely identifies this feed entry. 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. But if there is no content sub-element in a feed entry, at least one link sub-element with rel="alternate" is required.
• <published> - Specifying a time stamp of when this feed entry was originally published A feed element may have zero or one published sub-element.
• <rights> - Specifying the information about the copyrights for this feed. A feed element may have zero or one rights sub-element.
• <source> - Specifying a feed entry in another feed document if this entry is a copy of that entry. A feed element may have zero or one source sub-element.
• <summary> - Specifying a summary for this feed entry. A feed element may have zero or one summary sub-element. However it is recommended that each feed entry to have one summary 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.