<xs:attribute name="orientation" use="required" type="xs:string"/>
<xs:attribute name="indicator-display" type="xs:string"/>
<xs:attribute name="app-control-operation" type="xs:string"/>
+ <xs:attribute name="color-depth" type="xs:string"/>
<xs:anyAttribute namespace="##any" processContents="lax"/>
</xs:complexType>
</xs:element>