Can optional elements be hidden?

[Roger L Costello]

<xs:sequence dfdl:hiddenGroupRef="hideH" />
...
<xs:group name="hideH">
    <xs:sequence>
        <xs:element name="h" 
                 dfdl:length="1" 
                 dfdl:lengthKind="explicit" 
                 type="xs:string" 
                 dfdl:outputValueCalc="{'H'}" 
                 minOccurs="0"/>
    </xs:sequence>
</xs:group>

Results in this error: dfdl:outputValueCalc cannot be defined on optional 
elements.

Is there a way to hide optional elements?