09 九 06 RSS 2.0 Specification 1:What is RSS?
RSS is a Web content syndication format.
Its name is an acronym for Really Simple
Syndication.
RSS is a dialect of XML. All RSS files must conform to the XML 1.0
specification, as published on the
World Wide Web Consortium (W3C) website.
A summary of
RSS version history.
At the top level, a RSS document is a <rss> element, with a
mandatory attribute called version, that specifies the version of
RSS that the document conforms to. If it conforms to this
specification, the version attribute must be 2.0.
Subordinate to the <rss> element is a single <channel>
element, which contains information about the channel (metadata)
and its contents.
文章引用自：http://blogs.law.harvard.edu/tech/rss
