<xs:element name="title">
    <xs:annotation>
        <xs:documentation>
      The title element is not considered part of the flow of text.
      It should be displayed, for example as the page header or
      window title. Exactly one title is required per document.
      </xs:documentation>
    </xs:annotation>
    <xs:complexType mixed="true">
        <xs:attributeGroup ref="i18n" />
        <xs:attribute name="id" type="xs:ID" />
    </xs:complexType>
</xs:element>