IfcRegularTimeSeries

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcRegularTimeSeries			MOVED	Schema changed from IFCTIMESERIESRESOURCE to IFCDATETIMERESOURCE.
StartTime	X	X	MODIFIED	Type changed from IfcDateTimeSelect to IfcDateTime.
EndTime	X	X	MODIFIED	Type changed from IfcDateTimeSelect to IfcDateTime.

Semantic definitions at the entity

Entity definition

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.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
9	TimeStep	IfcTimeMeasure		A duration of time intervals between values.	X
10	Values	IfcTimeSeriesValue	L[1:?]	The collection of time series values.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcTimeSeries
1	Name	IfcLabel		An unique name for the time series.	X
2	Description	IfcText	?	A text description of the data that the series represents.	X
3	StartTime	IfcDateTime		The start time of a time series.	X
4	EndTime	IfcDateTime		The end time of a time series.	X
5	TimeSeriesDataType	IfcTimeSeriesDataTypeEnum		The time series data type.	X
6	DataOrigin	IfcDataOriginEnum		The origin of a time series data.	X
7	UserDefinedDataOrigin	IfcLabel	?	Value of the data origin if DataOrigin attribute is USERDEFINED.	X
8	Unit	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.	X
	HasExternalReference	IfcExternalReferenceRelationship @RelatedResourceObjects	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.	X
IfcRegularTimeSeries
9	TimeStep	IfcTimeMeasure		A duration of time intervals between values.	X
10	Values	IfcTimeSeriesValue	L[1:?]	The collection of time series values.	X

Formal representations

XML Specification

 <xs:element name="IfcRegularTimeSeries" type="ifc:IfcRegularTimeSeries" substitutionGroup="ifc:IfcTimeSeries" nillable="true"/>

 <xs:complexType name="IfcRegularTimeSeries">

  <xs:complexContent>

   <xs:extension base="ifc:IfcTimeSeries">

    <xs:sequence>

     <xs:element name="Values">

      <xs:complexType>

       <xs:sequence>

        <xs:element ref="ifc:IfcTimeSeriesValue" maxOccurs="unbounded"/>

       </xs:sequence>

       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcTimeSeriesValue"/>

       <xs:attribute ref="ifc:cType" fixed="list"/>

       <xs:attribute ref="ifc:arraySize" use="optional"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

    <xs:attribute name="TimeStep" type="ifc:IfcTimeMeasure" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcRegularTimeSeries

 SUBTYPE OF (IfcTimeSeries);

  TimeStep : IfcTimeMeasure;

  Values : LIST [1:?] OF IfcTimeSeriesValue;

END_ENTITY;

 EXPRESS-G diagram

	Serie mit regelmäßigen Zeitabständen
	Regular Time Series
	Séries temporelles régulières