所谓的变通，其实就是把用来表示日期的字符串拆分开来，依次根据年月日时分进行数字化排序。以遵循 RFC 822 标准的 RSS 2.0 feed 中的 pubDate 为例，一般的 rss 2.0 xml 文件如下：

<?xml version="1.0" encoding="UTF-8"?> <?xml-stylesheet href="http://www.zeali.net/css/rss2.xsl" type="text/xsl" media="screen"?> <rss xmlns:zeali="http://rssnamespace.org/zeali/ext/1.0" version="2.0"> <channel> <title>Zeal Blog - 泽欧里的网络日志</title> <link>http://www.zeali.net/</link> <image> <link>http://www.zeali.net/</link> <title>Zeal Blog - 泽欧里的网络日志</title> <url>http://www.zeali.net/pic/zeali.net.logo.gif</url> </image> <description>梦想就像鸡蛋，要么孵化，要么臭掉</description> <language>chi</language> <generator></generator> <ttl>5</ttl> <copyright>Copyright 2007 ZeaLi.net All Rights Reserved</copyright> <pubDate>Fri, 18 May 2007 15:48:39 +0800</pubDate> <category></category> <item> <title>批处理控制VMWare虚拟机</title> <link>http://www.zeali.net/entry/462</link> <author>zeal <nobody@nobody.com></author> <comments>http://www.zeali.net/entry/462#comm</comments> <description>... ...Something here ... ...</description> <guid isPermaLink="false">462@http://www.zeali.net/</guid> <category>开发/理论</category> <pubDate>Tue, 28 Nov 2006 14:03:00 +0800</pubDate> </item> ... ...More Items here ... ... </channel> </rss>

要对 Tue, 28 Nov 2006 14:03:00 +0800 这样的日期进行排序，相应的 XSLT 代码如下：

<!--定义12个月份的3位字母缩写，用以映射比较月份大小--> <xsl:variable name="vMonthNames" select="'|Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec'"/> <xsl:apply-templates select="channel/item"> <!--sort by year--> <xsl:sort select="substring(substring-after(substring-after(substring-after(pubDate, ' '), ' '), ' '), 1, 4)" data-type="number" order="descending"/> <!--sort by month--> <xsl:sort select="string-length(substring-before($vMonthNames,substring(substring-after(substring-after(pubDate, ' '), ' '), 1, 3)))" data-type="number" order="descending"/> <!--sort by day--> <xsl:sort select="substring(substring-after(pubDate, ' '), 1, 2)" data-type="number" order="descending"/> <!--sort by time--> <xsl:sort select="substring(substring-after(substring-after(substring-after(substring-after(pubDate, ' '), ' '), ' '), ' '), 1, 8)" data-type="text" order="descending"/> </xsl:apply-templates>