A Person construct is an element that describes a person, corporation, or similar entity. Note: in this way it is similar to foaf:Agent 1 1 EntryId s an Identity construct that conveys a permanent, universally unique identifier for an Entry. All properties that have an EntryId as Subject are necessary properties of the Entries that have the EntryId as id. An Identity construct is an element whose content conveys a permanent, universally unique identifier for the construct's parent. Its content MUST be an absolute URI. When an Atom document is relocated, migrated, syndicated, republished, exported or imported, the content of its Identity construct MUST NOT change. Put another way, an Identity construct pertains to all instantiations of a particular Atom entry or feed; revisions retain the same content in their Identity constructs. 1 conveys a URI associated with the entry. The nature of the relationship as well as the link itself is determined by the element's content. 1 A Link construct is an empty element that describes a connection from an Atom document to another Web resource. Conveys the URI of an introspection file associated with the feed the URI of the object if it is not an anonymous node should be the location where the content can be found. points to the entries of the Feed that conveys the URI used to add entries to the feed. Indicates the Person-s who contributed to the Entry, or to the Feed if the given Entry is the head of the Feed points to at least one link object with a rel property of "alternate". And must not point to more than one with such a rel value and the same type attribute value. The original source of the Entry. This points to the Entry that is the head of the feed of which it is a part. A uri associated with the person. (note: not very clear. Should this be a home page?) related alternate indicates the type of relationship that the link represents. A link of type "alternate" is what is known as a permalink. Property indicating the most recent instant in time when a change to the entry was made that the publisher wishes to bring to the attention of subscribers. For example, such changes might not include minor adjustments like spelling and grammatical corrections. The "atom:email" element's content conveys an e-mail address associated with the persons. The object of this property must be an e-mail URI. Conveys a human readable name for the person The "title" attribute conveys human-readable information about the link. describes the language of the resource pointed to by the href attribute. When used together with the rel="alternate", it implies a translated version of the entry. indicates the version of the Atom specification that the Entry conforms to. If the entry is the head of a feed, then this specifies the version of the Feed conveys a short summary, abstract or excerpt of the entry. conveys a human-readable title for the Entry. If the Entry is the head of a feed, then it conveys a human readable title for the Feed. A short human readable description of the feed of which this Entry is the head. The object of this relation is used to retrieve and edit the source representation of the entry which is the subject of it. points to the default author of the Entry, or of the Feed if the Entry is the head of the feed. the value of the content The ID of this entry. All Entries with the same id are thought of as being versions of the same thing. TEXT XHTML HTML the type of the content the information about a feed Indicates the instant in time associated with an event early in the life cycle of the entry. Typically, atom:published will be associated with the initial creation or first availability of the resource.