TimePeriodType, and TimeInstantType. TimePeriodType can be used to describe both a time range, and a floating time period. Restricting the elements to those outlined above will simplify client implementation. ’ Figure . Different representations of time Notes: In the databases we examined, data series appear in three different forms: a time range specified by begin time and end time, a single observation specified by a single time stamp, and a floating time range extending backward, from the current date and time, by a specified number of days (the latter being common when referring to real time observations kept for a limited time). The two XML elements used to describe these situations are derived from the parent type TimeIntervalType. They are TimePeriodType (for a time range, and floating real time data), and TimeInstantType (for a single observation). The dateTime type is specified in ISO 8061 format. The following form is the minimum acceptable “YYYY-MM-DDThh:mm:ss” where: * YYYY indicates the year * MM indicates the month * DD indicates the day * T indicates the start of the required time section * hh indicates the hour * mm indicates the minute * ss indicates the second Note: All components are required! XML This represents a time range, with a begin and an end time. <!--Generic --> <timeInterval> <beginDateTime>1982-12-09T00:00:00</beginDateTime> <endDateTime>1982-12-09T00:00:00</endDateTime>
TimePeriodType, and TimeInstantType. TimePeriodType can be used to describe both a time range, and a floating time period. Restricting the elements to those outlined above will simplify client implementation. ’ Figure . Different representations of time Notes: In the databases we examined, data series appear in three different forms: a time range specified by begin time and end time, a single observation specified by a single time stamp, and a floating time range extending backward, from the current date and time, by a specified number of days (the latter being common when referring to real time observations kept for a limited time). The two XML elements used to describe these situations are derived from the parent type TimeIntervalType. They are TimePeriodType (for a time range, and floating real time data), and TimeInstantType (for a single observation). The dateTime type is specified in ISO 8061 format. The following form is the minimum acceptable “YYYY-MM-DDThh:mm:ss” where: * YYYY indicates the year * MM indicates the month * DD indicates the day * T indicates the start of the required time section * hh indicates the hour * mm indicates the minute * ss indicates the second Note: All components are required! XML This represents a time range, with a begin and an end time. <!--Generic --> <timeInterval> <beginDateTime>1982-12-09T00:00:00</beginDateTime> <endDateTime>1982-12-09T00:00:00</endDateTime>
WaterML_1_1_part1_v2.docx