<?xml version='1.0' encoding='UTF-8'?> <rougail version="0.10"> <variables> <variable name="var1"> <value>no</value> </variable> <variable name="var2" multi="True"/> </variables> <constraints> <fill name="calc_value"> <param type="variable">var1</param> <param type="boolean" name="multi">True</param> <target>var2</target> </fill> </constraints> </rougail>