Natural language names
Serie mit unregelmäßigen Zeitabständen
Irregular Time Series
Séries temporelles irrégulières
Change log
      StartTimeXXMODIFIEDType changed from IfcDateTimeSelect to IfcDateTime.
      EndTimeXXMODIFIEDType changed from IfcDateTimeSelect to IfcDateTime.
Semantic definitions at the entity
Entity definition

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.
Attribute definitions
#AttributeTypeCardinalityDescription G
9ValuesIfcIrregularTimeSeriesValueL[1:?] The collection of time series values.X
Inherited definitions from supertypes
Entity inheritance IfcTimeSeries
Attribute inheritance
1NameIfcLabel An unique name for the time series.X
2DescriptionIfcText? A text description of the data that the series represents.X
3StartTimeIfcDateTime The start time of a time series.X
4EndTimeIfcDateTime The end time of a time series.X
5TimeSeriesDataTypeIfcTimeSeriesDataTypeEnum The time series data type.X
6DataOriginIfcDataOriginEnum The origin of a time series data.X
7UserDefinedDataOriginIfcLabel? Value of the data origin if DataOrigin attribute is USERDEFINED.X
8UnitIfcUnit? 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.X
S[1:?]Reference to an external reference, e.g. library, classification, or document information, that is associated to the IfcTimeSeries.
IFC4 CHANGE New inverse attribute.
9ValuesIfcIrregularTimeSeriesValueL[1:?] The collection of time series values.X
Formal representations
XML Specification
 <xs:element name="IfcIrregularTimeSeries" type="ifc:IfcIrregularTimeSeries" substitutionGroup="ifc:IfcTimeSeries" nillable="true"/>
 <xs:complexType name="IfcIrregularTimeSeries">
   <xs:extension base="ifc:IfcTimeSeries">
     <xs:element name="Values">
        <xs:element ref="ifc:IfcIrregularTimeSeriesValue" maxOccurs="unbounded"/>
       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcIrregularTimeSeriesValue"/>
       <xs:attribute ref="ifc:cType" fixed="list"/>
       <xs:attribute ref="ifc:arraySize" use="optional"/>
EXPRESS Specification
ENTITY IfcIrregularTimeSeries
 SUBTYPE OF (IfcTimeSeries);
  Values : LIST [1:?] OF IfcIrregularTimeSeriesValue;

Link to EXPRESS-G diagram EXPRESS-G diagram

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