r based-->
<!--upon "previous" data or "past" data. A <b>past</b> range includes the-->
<!--given time period ending now. A <b>previous</b> range also includes the-->
<!--given time period, but its end time is quantized to correspond to the-->
<!--period type. For example, if the period type is "Hour(s)" and number of-->
<!--periods is 1, and the report runs at 18:05, the time span that will be-->
<!--used is from 17:00 (inclusive) to 18:00 (exclusive). If the number of-->
<!--periods were, say, 3, the time