The wfw namespace, http://wellformedweb.org/CommentAPI/ contains multiple elements. As more are added in various places I will endeavor to keep the list here updated.

The first element to appear in this namespace is comment. This element appears in RSS feeds and contains the URI that comment entries are to be POSTed to.

The second element to appear in the wfw namespace is commentRss. This element also appears in RSS feeds and contains the URI of the RSS feed for comments on that Item.

NOTE: For quite a while, this page has had a typo and erroneously referred to this element as commentRSS as opposed to the correct commentRss. Feed consumers should be aware that they may run into both spellings in the wild.