title: XML Schema for sequence of elements with same name but different attribute values?
body: <p>How can I specify an XML schema for an instance document like this:</p>
  
  <pre><code>&lt;productinfo&gt;
    &lt;!-- other stuff --&gt;
    &lt;informationset type="Manufacturer"&gt;
      &lt;!-- content not relevant --&gt;
    &lt;/informationset&gt;
    &lt;informationset type="Ingredients"&gt;
      &lt;!-- content not relevant --&gt;
    &lt;/informationset&gt;
  &lt;/productinfo&gt;
  </code></pre>
  
  <p>that is, a "productinfo" element containing a sequence of two "informationset" children, the first having <code>@type="Manufacturer"</code> and the second having <code>@type="Ingredients"</code>?</p>