什么是rss

March 12, 2006 on 9:19 am | In 2006 |

RSS是一种用于共享新闻和其他Web内容的数据交换规范，起源于网景通讯公司的推”Push”技术，将订户订阅的内容传送给他们的通讯协同格式(Protocol)。RSS可以是以下三个解释的其中一个：
* Really Simple Syndication
* RDF (Resource Description Framework) Site Summary
* Rich Site Summary
但其实这三个解释都是指同一种Syndication的技术。
目前RSS规范的主要版本有0.91、1.0和2.0。
0.91版和1.0版完全不同，风格不同，制定标准的人也不同。0.91版和2.0版一脉相承。1.0版更靠拢XML标准。
RSS目前广泛用于blog、wiki和网上新闻频道，世界多数知名新闻社网站都提供RSS订阅支持。

以上是来自维基百科的官方解释。经常有同学问我这个问题，显然如果照上面的话回答她，跟没说差不多。因此有必要想一个好一点的解释( 当然是按自己的理解了 )：我们现在吃饭一般在食堂，要吃一餐要走一段路，经常会懒得去，如果能有外卖就好了，想吃什么，打个电话过去，过一会儿他们就送上门来。在以前，我们看网页总是要打开它们的网址，去到他们的网站，而且除了看到你想看到的东西外，网页上一般还充斥一些你不想看到的东西，比如广告。rss的功能就像外卖一样，你可以“订”你想要的东西，而且每当有内容更新时它会自动送到你的面前。而你有许多方法订阅rss，在线（eg. bloglines, google reader)的或是离线(eg.周博通）的，不像叫外卖一般只能靠打电话。老维特根斯坦说过：所有的比喻都是蹩脚的：rss也有广告，这个学校没有外卖。我们也没有必要知道rss是什么，除非想当科学家。


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