+ <!-- define a trace inside the XML file -->
+ <trace id="mytrace" periodicity="12">
+ 5 100 <!-- new value at time 5 is 100 -->
+ 12 200 <!-- new value at time 12 is 200 -->
+ 15 140 <!-- new value at time 15 is 140 -->
+ <!-- value will stay at 140 for 12 more seconds (the periodicity parameter), and go back on top of the trace afterward) -->
+ </trace>
+