<xs:element name="ruby">
    <xs:annotation>
        <xs:documentation>Simple W3C Ruby Annotation - see http://www.w3.org/TR/ruby/#simple-ruby1</xs:documentation>
    </xs:annotation>
    <xs:complexType>
        <xs:annotation>
            <xs:documentation>Simple W3C Ruby Annotation - see http://www.w3.org/TR/ruby/. </xs:documentation>
        </xs:annotation>
        <xs:sequence>
            <xs:element ref="rb" />
            <xs:choice>
                <xs:element ref="rt" />
                <xs:sequence>
                    <xs:element ref="rp" />
                    <xs:element ref="rt" />
                    <xs:element ref="rp" />
                </xs:sequence>
            </xs:choice>
        </xs:sequence>
        <xs:attributeGroup ref="commonPowerAttributes" />
        <xs:attributeGroup ref="i18nAttributes" />
        <xs:anyAttribute namespace="##other" processContents="lax" />
    </xs:complexType>
</xs:element>