Use the last number found.
+=item B<GaugePersist>
+
+Use the last number found. The number if not reset at the end of an interval.
+It is continously reported until another number if matched. This is intended
+for cases in which only state changes are reported, for example a thermometer
+that only reports the temperature when it changes.
+
=item B<CounterSet>
=item B<DeriveSet>