<xsd:element name="switchViewAction"> <xsd:complexType> <xsd:attribute name="view" type="xsf:xdViewName" use="required" /> </xsd:complexType> <xsd:keyref name="switchViewAction_view_keyref" refer="xsf:view_name_key"> <xsd:selector xpath="." /> <xsd:field xpath="@view" /> </xsd:keyref> </xsd:element>