import Qt 4.6 import Qt.test 1.0 QtObject { property var obj obj: MyQmlObject { id: myObject value: 92 } property bool test1: false property bool test2: false property bool test3: false property bool test4: false Component.onCompleted: { test1 = myObject.value == 92; test2 = obj.value == 92; myObject.deleteOnSet = 1; test3 = myObject.value == undefined; // test4 = obj.value == undefined; } }