For an assignment in my internship, I need to be able to list all the products stored in an online XML file created with Google Merchant Center and filter them by <g:product_type>Clubteams &gt; Nederland &gt; Ajax</g:product_type>

However, XSLT gives me an error every time I try to use any of Google's "g:something" tags, and I don't know what to do. I've tried using variables, I've tried listing the contents as raw text, I've even tried replacing the colon with a dot... Nothing I can think of seems to work.

CLARIFICATION: I'm not yet filtering the results by g:product_type, as I first want to get the images to work. But my problem overall is that XSL just doesn't seem to be able to interpret g:something tags at all.

My current XSLT is as follows:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]>
<xsl:stylesheet
    version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:msxml="urn:schemas-microsoft-com:xslt"
    xmlns:umbraco.library="urn:umbraco.library"
    xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon"
    xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes"
    xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath"
    xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions"
    xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings"
    xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets"
    exclude-result-prefixes="msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets">

<xsl:output method="xml" omit-xml-declaration="yes"/>
<xsl:param name="currentPage"/>

<xsl:template match="/">
  <!-- start writing XSLT -->
  <xsl:variable name="MyFeed" select="umbraco.library:GetXmlDocumentByUrl('http://shop.voetbalshirts.com/content/files/exportimport/froogle_7679424322.xml')" />
  <xsl:for-each select="$MyFeed/rss/channel/item">
          <div style="padding: 10px;">
              <span style="font-weight:bold"><xsl:value-of select="title"/></span><br />
              <img>
                  <xsl:attribute name="src"><xsl:value-of select="g:image_link"/></xsl:attribute>
              </img><br />
              <xsl:value-of select="description"/>
          </div>
  </xsl:for-each>
</xsl:template>
</xsl:stylesheet>

Does anybody know how to solve this problem?

-Rick