摘要：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规范已经冻结，Harvard University拥有其版权。不能做大的修改（虽然该规范处于Creative Commons 协议） 且计划未来的工作在一个不同的名称下进行；Atom是这类工作的一个例子。
Atom 1.0的规范 RFC 4287 ( HTML Version ); 体现了 IETF 内的 Atompub Working
Group 大多数人的意见，并由IETF和 Internet Engineering Steering Group
讨论并通过。该规范在架构设计上使得IETF能有预期的发布新的版本或修正版本而不会破坏当前的实施。虽然这样做并没有约定，当前也没有明确的需要。
