title: Google mobile sitemap alternate links, issue with XHTML
body: <p>I am trying to set up the following <a href="https://developers.google.com/webmasters/mobile-sites/mobile-seo/configurations/separate-urls?hl=en" rel="nofollow">configuration</a>.</p>
  
  <p>But when I try to validate my sitemap XML with validator (validome.org), I get the following error:
  <em>The matching wildcard is strict, but no declaration can be found for element 'xhtml:link'.</em></p>
  
  <p>Test sitemap I tried to validate:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8" ?&gt; 
  &lt;urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"              
          xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
          xmlns:xhtml="http://www.w3.org/1999/xhtml" 
          xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9
                              http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd
                              http://www.w3.org/2002/08/xhtml www.w3.org/2002/08/xhtml/xhtml1-strict.xsd"&gt;
     &lt;url&gt; 
          &lt;loc&gt;http://mobile.example.com/article100.html&lt;/loc&gt;
          &lt;xhtml:link rel="nofollow" href="http://www.example.com/schweiz-deutsch/" /&gt; 
     &lt;/url&gt; 
  &lt;/urlset&gt;
  </code></pre>
  
  <p>I have tried changing schemas, and namespaces, but no luck so far.
  Anyone could determine the problem here?</p>