title: Error: The namespace of element schema must be from schema namespace http://www.w3.org/2001/XMLSchema
body: <p>Below is my XSD. I am getting errors. Could you please validate this?</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="windows-1252" ?&gt;
  &lt;xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
              xmlns="http://api.vvz.com/"
              xmlns:vz="http://api.vvz.com/"
              targetNamespace="http://api.vvz.com/"&gt;
    &lt;vz:element name="Account"&gt;
      &lt;annotation&gt;
        &lt;documentation&gt;
          A sample element
        &lt;/documentation&gt;
      &lt;/annotation&gt;
      &lt;simpleType name="ID"&gt;
      &lt;restriction base="xs:string"&gt;
       &lt;pattern value='[a-zA-Z0-9]'/&gt;
      &lt;/restriction&gt;
     &lt;/simpleType&gt;
       &lt;complexType&gt;
      &lt;complexContent&gt;
       &lt;sequence&gt;
       &lt;element minOccurs="0" maxOccurs="unbounded" name="fieldsToNull"
                nillable="true" type="string"/&gt;
       &lt;element minOccurs="0" maxOccurs="1" name="Id" nillable="true"
                type="vz:ID"/&gt;
      &lt;/sequence&gt;
      &lt;/complexContent&gt;
     &lt;/complexType&gt;
    &lt;/vz:element&gt;
  &lt;/xsd:schema&gt;
  </code></pre>
  
  <p>The error is </p>
  
  <blockquote>
    <p>The namespace of element schema must be from schema namespace '<a href="http://www.w3.org/2001/XMLSchema" rel="nofollow">http://www.w3.org/2001/XMLSchema</a>'</p>
  </blockquote>
  
  <p>Please help me out.</p>