abstract：RSS 2.0 has a   <  description  >   element which is commonlyused to contain either the full text of an entry or just a synopsis (sometimes in the same feed), and which somet

RSS 2.0 has a   <  description  >   element which is commonly

used to contain either the full text of an entry or just a synopsis
(sometimes in the same feed), and which sometimes is absent. There is no
built-in way to signal whether the contents are complete.

Atom has separate   <  summary  >   and   <  content  >  
elements. The summary is encouraged for accessibility reasons if the
content is non-textual (e.g. audio) or non-local (i.e. identified by
pointer).

RSS 2.0規(guī)范已經(jīng)凍結(jié)，Harvard University擁有其版權(quán)。不能做大的修改（雖然該規(guī)范處于Creative Commons 協(xié)議） 且計劃未來的工作在一個不同的名稱下進行；Atom是這類工作的一個例子。

Atom 1.0的規(guī)范 RFC 4287 ( HTML Version ); 體現(xiàn)了 IETF 內(nèi)的 Atompub Working
Group 大多數(shù)人的意見，并由IETF和 Internet Engineering Steering Group
討論并通過。該規(guī)范在架構(gòu)設(shè)計上使得IETF能有預(yù)期的發(fā)布新的版本或修正版本而不會破壞當(dāng)前的實施。雖然這樣做并沒有約定，當(dāng)前也沒有明確的需要。