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

<xs:attribute name="gender">
   <xs:simpleType>
   <xs:restriction base="xs:string">
   <xs:pattern value="male|female"/>  
   </xs:restriction>
</xs:simpleType>
</xs:attribute>

<person gender="female">
   <firstname>Anita</firstname>
   <lastname>Ficks</lastname>
</person>
<person gender="male">
   <firstname>Jim</firstname>
   <lastname>Geimer</lastname>
</person>