Abstract
Allow multiple atom:entry elements with the same atom:id value (but encourage different atom:updated values) in the same atom:feed document.
Status
Open
Rationale
Multiple usage scenarios have been proposed.
Proposal
in format-08:
1. Remove the last bullet point in 4.1.1
2. Add the following paragraph, either to atom:entry or atom:feed, at the editors' discretion.
If multiple atom:entry elements with the same atom:id value appear in an Atom Feed document, they represent the same entry. Their atom:updated timestamps SHOULD be different, and processing software SHOULD regard entries with duplicate atom:id and atom:updated values as evidence of an error in the feed generation. If an Atom Feed Document contains multiple entries with the same atom:id, software MAY choose to display all of them or some subset of them. One typical behavior would be to display only the entry with the latest atom:updated timestamp.
Impacts
Improves usability of Atom as a feed archive format. Enables Atom feeds to provide multiple timestamped versions of entry descriptions.
