IFC 4.3.x development

8.5.3.6 IfcRegularTimeSeries

8.5.3.6.1 Semantic definitions at the entity

In a regular time series, the data arrives predictably at predefined intervals. In a regular time series there is no need to store multiple time stamps and the algorithms for analyzing the time series are therefore significantly simpler. Using the start time provided in the supertype, the time step is used to identify the frequency of the occurrences of the list of values.

EXAMPLE  A smoke detector samples the concentration of particulates in a space at a fixed rate (for example, every six seconds); a control system measures the outside air temperature every hour.

HISTORY  New entity in IFC2x2.

8.5.3.6.1 Attributes

# Attribute Type Description
IfcTimeSeries
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.
IfcRegularTimeSeries
9 TimeStep IfcTimeMeasure A duration of time intervals between values.
10 Values LIST [1:?] OF IfcTimeSeriesValue The collection of time series values.

8.5.3.6.2 Entity inheritance

dot_inheritance IfcRegularTimeSeries IfcRegularTimeSeries IfcTimeSeries IfcTimeSeries IfcRegularTimeSeries->IfcTimeSeries IfcIrregularTimeSeries IfcIrregularTimeSeries IfcIrregularTimeSeries->IfcTimeSeries

8.5.3.6.3 Formal representations

ENTITY IfcRegularTimeSeries
 SUBTYPE OF (IfcTimeSeries);
	TimeStep : IfcTimeMeasure;
	Values : LIST [1:?] OF IfcTimeSeriesValue;
END_ENTITY;