The question of inheritance of author/contributor from feed into entry needs to be disambiguated. I looked from the format-08 text and found that we already have reasonable wording in section 4.2.4 (The "atom:copyright" Element). There is also a hint in section 4.2.11 (The "atom:source" Element) that some other elements should also be inheritable.
Proposal: insert text similar to § 4.2.4 ¶ 3 into § 4.2.1 The "atom:author" Element § 4.2.2 The "atom:category" Element § 4.2.3 The "atom:contributor" Element ------------------------- some relevant snippets ------------------------- 4.2.4 The "atom:copyright" Element > If an atom:entry element does not contain an atom:copyright element, > then the atom:copyright element of the containing atom:feed element's > atom:head element, if present, is considered to apply to the entry. 4.1.2 The "atom:entry" Element > atom:entry elements MUST contain exactly one atom:author element, > unless the atom:entry contains an atom:source element which contains > an atom:author element, or, in an Atom Feed Document, the atom:feed > element contains an atom:author element itself. ... but that doesn't explain that the atom:entry inherits the author from the feed. It actually suggests that an entry may be author-less, because the spec text for atom:author only says this: 4.2.11 The "atom:source" Element > Such metadata SHOULD be preserved if the source atom:feed contains any > of the child elements atom:author, atom:contributor, atom:copyright, or > atom:category and those child elements are not present in the source > atom:entry. ... which calls out atom:category in the same sentence as atom:author, atom:contributor, and atom:copyright ... which might suggest that atom:category should also be inherited. I don't recall what the thinking was, but I'd +1 inheritance of atom:category from atom:feed into atom:entry. e.