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<variable>
	<variableId>X</variableId>
    ....
</variable>
<variable>
	<variableId>Y</variableId>
    ....
</variable>
<transformation id="user simple with boolean coefficient test">
	<user>
		<simple>
            <expression>IF(COEF_OPTION == 1, X, Y)</expression>
            <coefficientSetFunctions>
               <coefficient id="COEF_OPTION" value="@OPTION_TYPE@==&quot;hard&quot;"/>
            <coefficientSetFunctions></coefficientSetFunctions>
    	    <outputVariable>
		        <variableId>Y</variableId>
		    </outputVariable>
		</simple>
	</user>
</transformation>