<xs:element name="meta">
 <xs:annotation><xs:documentation>Мета данные, кодировка файла</xs:documentation></xs:annotation>
      <xs:complexType>
     <xs:attribute name="charset"/>
     </xs:complexType>
</xs:element>

<xs:simpleType name="mountainBikeSize">
  <xs:restriction base="xs:string">
    <xs:enumeration value="small" />
    <xs:enumeration value="medium" />
    <xs:enumeration value="large" />
  </xs:restriction>
</xs:simpleType>

<xs:complexType name="FamilyMountainBikes">
  <xs:simpleContent>
    <xs:extension base="mountainBikeSize">
      <xs:attribute name="familyMember">
      <xs:restriction base="xs:string">
        <xs:enumeration value="child" />
        <xs:enumeration value="male" />
        <xs:enumeration value="female" />
      </xs:restriction>
    </xs:attribute>
    </xs:extension>
  </xs:simpleContent>
</xs:complexType>