xml - 使用更多字段扩展 RSS 格式？

Question

我有一个网站，需要为其创建 RSS 提要。是否有用于将自定义字段添加到 RSS 提要的标准格式？例如，我想在我的 RSS 提要中添加一个“位置”元素。我有一些合作伙伴想要使用提要并能够使用特定于我的网站的自定义字段。

对于当前的 RSS 2.0 格式，这些是 RSS 2.0 规范中包含的可用字段:

<?xml version="1.0" encoding="UTF-8" ?>
<rss version="2.0">
  <channel>
    <title>RSS Example</title>
    <description>This is an example of an RSS feed</description>
    <link>http://www.domain.com/link.htm</link>
    <lastBuildDate>Mon, 28 Aug 2006 11:12:55 -0400 </lastBuildDate>
    <pubDate>Tue, 29 Aug 2006 09:00:00 -0400</pubDate>
    <language>en-us</language>
    <copyright>Copyright 2002, Spartanburg Herald-Journal</copyright>
    <managingEditor>geo@herald.com (George Matesky)</managingEditor>
    <webMaster>betty@herald.com (Betty Guernsey)</webMaster>
    <category>Newspapers</category>
    <generator>MightyInHouse Content System v2.3</generator>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <image>
      <title>Something</title>
      <url>http://something.com/image.jpg</url>
      <link>http://something.com</link>
      <description>This is something</description>
    </image>
    <rating>(PICS-1.1 "http://www.classify.org/safesurf/" l r (SS~~000 1))</rating>
    <item>
      <title>Item Example</title>
      <description>This is an example of an Item</description>
      <link>http://www.domain.com/link.htm</link>
      <guid> 1102345</guid>
      <pubDate>Tue, 29 Aug 2006 09:00:00 -0400</pubDate>
      <author>lawyer@boyer.net (Lawyer Boyer)</author>
      <category>Grateful Dead</category>
      <comments>http://www.myblog.org/cgi-local/mt/mt-comments.cgi?entry_id=290</comments>
      <enclosure url="http://www.scripting.com/mp3s/weatherReportSuite.mp3" length="12216320" type="audio/mpeg" />
      <source url="http://www.tomalak.org/links2.xml">Tomalak's Realm</source>
    </item>
  </channel>
</rss>

如果我想添加更多元素以供合作伙伴使用，以便他们可以随意使用和解析它们怎么办？同时，我不想破坏 RSS 阅读器，如果他们将我的 RSS 提要添加到其中。关于处理此问题的最佳方法有什么想法吗？

Answer 1

根据RSS 2.0 Specification然后:

"RSS originated in 1999, and has strived to be a simple, easy to understand format, with relatively modest goals. After it became a popular format, developers wanted to extend it using modules defined in namespaces, as specified by the W3C.

RSS 2.0 adds that capability, following a simple rule. A RSS feed may contain elements not described on this page, only if those elements are defined in a namespace."

查看文章 Extending RSS 2.0 With Namespaces它向您展示了如何执行此操作。文章中的一个示例显示作者将一些自定义博客字段添加到他们的提要中:

 <rss version="2.0"
     xmlns="http://backend.userland.com/rss2"
     xmlns:blogChannel="http://backend.userland.com/blogChannelModule">
 <channel>
  <title>Scripting News</title>
  <link>http://www.scripting.com/</link>
  <blogChannel:blogRoll>http://radio.weblogs.com/ ... /file.opml</blogChannel:blogRoll>
  <blogChannel:mySubscriptions>http://ra ... /file.opml</blogChannel:mySubscriptions>
  <blogChannel:blink>http://inessential.com/</blogChannel:blink>
  .
  .
  .
 </channel>
 </rss>