title: cvc-elt.1.a: Cannot find the declaration of element '...'
body: <p>My XSD:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt;
  &lt;xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://tempuri.org/"
      elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://tempuri.org/"&gt;
      &lt;xsd:simpleType name="Letter"&gt;
          &lt;xsd:restriction base="xsd:string"&gt;
              &lt;xsd:pattern value="^[A-Za-z]?$" /&gt;
          &lt;/xsd:restriction&gt;
      &lt;/xsd:simpleType&gt;
  
      &lt;xsd:element name="Test" type="Letter" /&gt;
  &lt;/xsd:schema&gt;
  </code></pre>
  
  <p>My XML:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;Letter&gt;A&lt;/Letter&gt;
  </code></pre>
  
  <p>Any ideas?</p>
  
  <p>Here's the website I'm using:</p>
  
  <p><a href="http://tools.decisionsoft.com/schemaValidate/" rel="nofollow">http://tools.decisionsoft.com/schemaValidate/</a></p>