title: Error: Element must have no character or element information item [children], because the type's content type is empty
body: <p>I can't seem to grasp on what this online validator is telling me:</p>
  
  <blockquote>
    <p>cvc-complex-type.2.1: Element 'characterPower' must have no character or element information item [children], because the type's content type is empty. </p>
  </blockquote>
  
  <p>(I get the the same error code for the 'weakness' element as well)</p>
  
  <pre><code>    &lt;xs:element name="characterPower" type="xs:string"&gt;
          &lt;xs:complexType&gt;
              &lt;xs:attribute name="origin" type="originType" use="required"/&gt;
          &lt;/xs:complexType&gt;
      &lt;/xs:element&gt;
      &lt;xs:element name="weakness"&gt;
          &lt;xs:complexType&gt;
              &lt;xs:attribute name="lethality" type="lethalType" use="required"/&gt;
          &lt;/xs:complexType&gt;
      &lt;/xs:element&gt;
  
      &lt;xs:simpleType name="originType"&gt;
          &lt;xs:restriction base="xs:string"&gt;
              &lt;xs:enumeration value="alien" /&gt;
              &lt;xs:enumeration value="radiation" /&gt;
              &lt;xs:enumeration value="mutant" /&gt;
              &lt;xs:enumeration value="skill" /&gt;
          &lt;/xs:restriction&gt;
      &lt;/xs:simpleType&gt;
  
      &lt;xs:simpleType name="lethalType"&gt;
          &lt;xs:restriction base="xs:string"&gt;
              &lt;xs:enumeration value="major" /&gt;
              &lt;xs:enumeration value="minor" /&gt;
          &lt;/xs:restriction&gt;
      &lt;/xs:simpleType&gt;
  </code></pre>
  
  <p>And this is the piece of the XML document that relates to it</p>
  
  <pre><code>        &lt;characterPower origin="mutant"&gt;Weapon Expertise, Healing Factor, Master Martial Artist and Assassin&lt;/characterPower&gt;
          &lt;weakness lethality="minor"&gt;Poor Mental State&lt;/weakness&gt;
  </code></pre>
  
  <p>Any help would be greatly appreciated.</p>