Comparison of Elements, RSS2 and Atom 1.0

RSS 2.0Atom 1.0Comments
rss-Vestigial in RSS
channelfeed
titletitle
linklinkAtom defines an extensible family of "rel" values
descriptionsubtitle
language-Atom uses standard "xml:lang" attribute
copyrightrights
webMaster-
managingEditorauthor or contributor
pubDatepublished (in entry)Atom has no feed-level equivalent
lastBuildDate (in channel)updatedRSS has no item-level equivalent
categorycategory
generatorgenerator
docs-
cloud-
ttl-
imagelogoAtom recommends 2:1 aspect ratio
-iconAs in "favicon.ico"
rating-
textInput-
skipHours-
skipDays-
itementry
authorauthor
-contributor
descriptionsummary or contentdepending on whether full content is provided
comments-
enclosure-rel="enclosure" on <link> in Atom
guidid
source-rel="via" on <link> in Atom
-sourceContainer for feed-level metadata to support aggregation