<schema>

  <complexType name="Person">
    <attribute name="id" type="xs:string"/>
    <sequence>
      <element name="Name" type="xs:string"/>
      <element name="Lastname" type="xs:string"/>
      <element name="Degree" type="xs:int"/>
      <element name="Project" type="xs:string" minOccurs="0" maxOccurs="unbounded"/>
    </sequence>
  </complexType>

  <complexType name="Customer">
    <complexContent>
      <extension base="Person">
        <attribute name="pos" type="xs:string"/>
        <sequence>
          <element name="JobID" type="xs:string"/>
          <element name="FirmaID" type="xs:string"/>
        </sequence>
      </extension>
    </complexContent>
  </complexType>

</schema>
