Blogger.com has changed their feed syndication

It seems that Blogger has changed the type of syndication feed they use during the last month (Jan – Feb 2008), I discovered this when my Atom feed XSLT transformation broke when I published my last post.
I originally wrote XSLT to transform the previous feed type for my homepage blog updates, which assumed the following heirachy with the Atom 0.3 namespace:

<feed>...<entry>...</entry></feed>

Whereas the latest feed has changed to use both Atom and openSearch namespaces and the following structure:

<rss>...<channel>...<item>...</item></channel></rss>

The root node seems to suggest it is the RSS 2.0 standard, using the Atom namespace, which is peculiar, notice the openSearch namespace too...

<rss xmlns:atom='http://www.w3.org/2005/Atom' xmlns:openSearch='http://a9.com/-/spec/opensearchrss/1.0/' version='2.0'>

Here's my updated XSLT to convert the new Blogger.com format.

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0"
xmlns:atom="http://www.w3.org/2005/Atom"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:openSearch="http://a9.com/-/spec/opensearchrss/1.0/">

<xsl:output method="xml" indent="yes" omit-xml-declaration="yes"/>
<xsl:template match="channel">
<div id="FeedSnippets">
<xsl:apply-templates select="item"  />
</div>
</xsl:template>


<xsl:template match="item" name="item">
<xsl:if test="position()<6">
<h4>
  <xsl:value-of select="title"/>
</h4>
<p>
  <xsl:choose>
    <xsl:when test="string-length(substring-before(atom:summary,'. ')) > 0">
      <xsl:value-of select="substring-before(atom:summary,'. ')" />...<br />
    </xsl:when>
    <xsl:when test="string-length(substring-before(atom:summary,'.')) > 0">
      <xsl:value-of select="substring-before(atom:summary,'.')" />...<br />
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="substring(atom:summary,0,200)" />...<br />
    </xsl:otherwise>
  </xsl:choose>
  <strong>Read full post: </strong>
  <a href="{link}">
    <xsl:value-of select="title"/>
  </a>
</p>
<hr />
</xsl:if>
</xsl:template>
</xsl:stylesheet>