ruleset ruleset1{
}
rule purchaseRule{

when{

?customer:customer.Customer(?purchaseYTD:purchaseYTD;?purchaseYTD>5000);
 }
then {

modify ?customer{status = "Gold";}

  }
 }
rule DisplayStatus{

when{

?customer:customer.Customer(?name:name;?s:status;?s=="Gold");
 }
then {

System.out.println((?name + " has Gold status "));

  }
 }