<xs:element name="person">
   <xs:complexType>
   <xs:sequence>
      <xs:element name="firstname" type="xs:string"/>
      <xs:element name="lastname" type="xs:string"/>
      <<
xs:element name="age" type="xs:anyType"/> 
   </xs:sequence>
   </xs:complexType>
</xs:element>

<person>
   <firstname>Danny</firstname>
   <lastname>Russell</lastname>
   
<age>1959-03-03</age> 
</person>
<person>
   <firstname>Carla</firstname>
   <lastname>Havers</lastname>
   
<age>46</age> 
</person>