IFC 4.3.0.1 (IFC4X3) development

8.5.3.12 IfcTimeSeries

ABSTRACT This definition may not be instantiated

8.5.3.12.1 Semantic definition

A time series is a set of a time-stamped data entries. It allows a natural association of data collected over intervals of time. Time series can be regular or irregular. In regular time series data arrive predictably at predefined intervals. In irregular time series some or all time stamps do not follow a repetitive pattern and unpredictable bursts of data may arrive at unspecified points in time.

The modeling of buildings and their performance involves data that are generated and recorded over a period of time. Such data cover a large spectrum, from weather data to schedules of all kinds to status measurements to reporting to everything else that has a time related aspect. Their correct placement in time is essential for their proper understanding and use, and the IfcTimeSeries subtypes provide the appropriate data structures to accommodate these types of data.

8.5.3.12.2 Entity inheritance

8.5.3.12.3 Attributes

# Attribute Type Description
IfcTimeSeries (9)
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.

Table 8.5.3.12.A

8.5.3.12.4 Formal representation

ENTITY IfcTimeSeries
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcIrregularTimeSeries
	,IfcRegularTimeSeries));
	Name : IfcLabel;
	Description : OPTIONAL IfcText;
	StartTime : IfcDateTime;
	EndTime : IfcDateTime;
	TimeSeriesDataType : IfcTimeSeriesDataTypeEnum;
	DataOrigin : IfcDataOriginEnum;
	UserDefinedDataOrigin : OPTIONAL IfcLabel;
	Unit : OPTIONAL IfcUnit;
 INVERSE
	HasExternalReference : SET [1:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects;
END_ENTITY;

8.5.3.12.5 References

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8.5.3.12.6 Changelog

  • attribute EndTime type, Changed from "IfcDateTimeSelect" to "IfcDateTime"
  • attribute StartTime type, Changed from "IfcDateTimeSelect" to "IfcDateTime"
  • inverse attribute DocumentedBy name, Changed from "DocumentedBy" to "HasExternalReference"
  • inverse attribute DocumentedBy type, Changed from "SET OF [0:1] IfcTimeSeriesReferenceRelationship FOR ReferencedTimeSeries" to "SET OF [1:?] IfcExternalReferenceRelationship FOR RelatedResourceObjects"