WITSML - Product Volume Period Component Schema. The type of period that is being reported. If not specified and a time is not given then the period is defined by the reporting period. A reporting period that is different from the overall report period. For example, a particular day within a monthly report. This period must conform to the kind of interval. If one value from a pair are given then both values must be given. The beginning date and time that the period represents. The beginning date and time that the period represents. The ending date and time that the period represents. The beginning date that the period represents. The ending date that the period represents. The uncorrected volume of the product. A positive value for an inlet port indicates flow into the port. A negative value for an inlet port indicates flow out of the port. A positive value for an outlet port indicates flow out of the port. A negative value for an outlet port indicates flow into of the port. This convention is designed such that a positive sign indicates an expected condition based on the intended port direction while a negative sign indicates an anomolous condition. The volume of the fluid, corrected to standard conditions of temperature and pressure. The sign of the value should conform to the above description of volume. The flow rate of the product. The sign of the value should conform to the above description of volume. Temperature of the product. Pressure of the product. The mass of the product. The electrical energy represented by the product. A timestamped remark about the amounts. Unique identifier for the Product Volume Period.