This version of the Atom schema is based on version 1.0 of the format specifications, found here http://www.atomenabled.org/developers/syndication/atom-format-spec.php. An Atom document may have two root elements, feed and entry, as defined in section 2. The Atom text construct is defined in section 3.1 of the format spec. The Atom person construct is defined in section 3.2 of the format spec. Schema definition for an email address. The Atom feed construct is defined in section 4.1.1 of the format spec. The Atom entry construct is defined in section 4.1.2 of the format spec. The Atom content construct is defined in section 4.1.3 of the format spec. The Atom cagegory construct is defined in section 4.2.2 of the format spec. The Atom generator element is defined in section 4.2.4 of the format spec. The Atom icon construct is defined in section 4.2.5 of the format spec. The Atom id construct is defined in section 4.2.6 of the format spec. The Atom link construct is defined in section 3.4 of the format spec. The Atom logo construct is defined in section 4.2.8 of the format spec. The Atom source construct is defined in section 4.2.11 of the format spec.