RDF/channel/image element with invalid attribute

<?xml version="1.0" encoding="utf-8"?>
<!--
Description:  RDF/channel/image element with invalid attribute
Message:      error
Author:       Validome Team <rss@validome.org>
Copyright:    2006 - www.validome.org
-->
<rdf:RDF
  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
  xmlns="http://purl.org/rss/1.0/"
>
  <channel rdf:about="http://www.validome.org/news.rss">
    <title>my title</title>
    <link>http://www.validome.org/feeds/1.0/</link>
    <description>my description</description>
    <image foo="foo" rdf:resource="http://xml.com/universal/images/xml_tiny.gif"/>
    <items>
      <rdf:Seq>
        <rdf:li resource="http://www.validome.org/2006/08/09/xslt/xslt.html"/>
        <rdf:li resource="http://www.validome.org/2006/08/09/rdfdb/index.html"/>
      </rdf:Seq>
    </items>
    <textinput rdf:resource="http://www.validome.org"/>
  </channel>
  <image rdf:about="http://xml.com/universal/images/xml_tiny.gif">
    <title>XML.com</title>
    <url>http://xml.com/universal/images/xml_tiny.gif</url>
    <link>http://www.xml.com</link>
  </image>
  <textinput rdf:about="http://www.validome.org">
    <title>my title</title>
    <description>textinput description</description>
    <name>my name</name>
    <link>http://www.validome.org</link>
  </textinput>
  <item rdf:about="http://www.validome.org/2006/08/09/xslt/xslt.html">
    <title>Processing Inclusions with XSLT</title>
    <link>http://www.validome.org/2006/08/09/xslt/xslt.html</link>
    <description>item description</description>
  </item>
  <item rdf:about="http://www.validome.org/2006/08/09/rdfdb/index.html">
    <title>Putting RDF to Work</title>
    <link>http://www.validome.org/2006/08/09/rdfdb/index.html</link>
    <description>item description</description>
  </item>
</rdf:RDF>