In an irregular time series, unpredictable bursts of data arrive at unspecified points in time, or most time stamps cannot be characterized by a repeating pattern.
EXAMPLE A circulating pump cycles on and off at unpredictable times as dictated by the demands on the piping system; the amount of light in a classroom varies depending on when the lights are manually switched on and off and how many lamps are controlled by each switch.
HISTORY New entity in IFC2x2.
|1||Name||IfcLabel||An unique name for the time series.|
|2||Description||OPTIONAL IfcText||A text description of the data that the series represents.|
|3||StartTime||IfcDateTime||The start time of a time series.|
|4||EndTime||IfcDateTime||The end time of a time series.|
|5||TimeSeriesDataType||IfcTimeSeriesDataTypeEnum||The time series data type.|
|6||DataOrigin||IfcDataOriginEnum||The origin of a time series data.|
|7||UserDefinedDataOrigin||OPTIONAL IfcLabel||Value of the data origin if DataOrigin attribute is USERDEFINED.|
|8||Unit||OPTIONAL IfcUnit||The unit to be assigned to all values within the time series. Note that mixing units is not allowed. If the value is not given, the global unit for the type of IfcValue, as defined at _IfcProject.UnitsInContext_ is used.|
|HasExternalReference||SET [1:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects||Reference to an external reference, e.g. library, classification, or document information, that is associated to the IfcTimeSeries. |
> IFC4 CHANGE New inverse attribute.
|9||Values||LIST [1:?] OF IfcIrregularTimeSeriesValue||The collection of time series values.|
ENTITY IfcIrregularTimeSeries SUBTYPE OF (IfcTimeSeries); Values : LIST [1:?] OF IfcIrregularTimeSeriesValue; END_ENTITY;