IFC 4.3.x development IfcIrregularTimeSeries Semantic definitions at the entity

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. Attributes

# Attribute Type Description
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 UserDefinedDataOriginOPTIONAL 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 RelatedResourceObjectsReference 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 inheritance

dot_inheritance IfcIrregularTimeSeries IfcIrregularTimeSeries IfcTimeSeries IfcTimeSeries IfcIrregularTimeSeries->IfcTimeSeries IfcRegularTimeSeries IfcRegularTimeSeries IfcRegularTimeSeries->IfcTimeSeries Formal representations

ENTITY IfcIrregularTimeSeries
 SUBTYPE OF (IfcTimeSeries);
	Values : LIST [1:?] OF IfcIrregularTimeSeriesValue;