Indicates a problem with the DNS request.
Contains information on the agent used to generate the feed.
Reference: validator.w3.org/feed/docs/rfc4287.html#element.generator
A directed acyclic graph that is tuned to hold named dependencies
An error that occurred during the resolution process
An error caused by searching for a dependency that is completely unknown, i.e. has no versions available whatsoever.
TextConstruct that describes a summary of the Entry.
Reference: validator.w3.org/feed/docs/rfc4287.html#element.summary