<?xml version='1.0' encoding='UTF-8'?> <rougail version="0.9"> <variables> <variable name="my_var1" auto_freeze="True"> <value>no</value> </variable> <variable name="my_var2"> <value>no</value> </variable> <variable name="server_deployed" type="boolean"> <value>False</value> </variable> </variables> <constraints> <fill name="calc_val"> <param type="variable">my_var2</param> <target>my_var1</target> </fill> </constraints> </rougail>