#### 8.3.3.8 IfcTimeSeries

| Séries temporelles
| Serie mit Zeitabständen

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.

> HISTORY New entity in IFC2x2.

XSD Specification:

<xs:element name="IfcTimeSeries" type="ifc:IfcTimeSeries" abstract="true" substitutionGroup="ifc:Entity" nillable="true"/>
<xs:complexType name="IfcTimeSeries" abstract="true">
<xs:complexContent>
<xs:extension base="ifc:Entity">
<xs:attribute name="Name" type="ifc:IfcLabel" use="optional"/>
<xs:attribute name="StartTime" type="ifc:IfcDateTime" use="optional"/>
<xs:attribute name="EndTime" type="ifc:IfcDateTime" use="optional"/>
<xs:attribute name="TimeSeriesDataType" type="ifc:IfcTimeSeriesDataTypeEnum" use="optional"/>
<xs:attribute name="DataOrigin" type="ifc:IfcDataOriginEnum" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcTimeSeries

| ABSTRACT SUPERTYPE OF(IfcIrregularTimeSeries);

Name | : | IfcLabel;
Description | : | OPTIONAL IfcStrippedOptional;
StartTime | : | IfcDateTime;
EndTime | : | IfcDateTime;
TimeSeriesDataType | : | IfcTimeSeriesDataTypeEnum;
DataOrigin | : | IfcDataOriginEnum;
UserDefinedDataOrigin | : | OPTIONAL IfcStrippedOptional;
Unit | : | OPTIONAL IfcStrippedOptional;

| INVERSE

END_ENTITY;

Attribute Definitions:

Name | : | An unique name for the time series.
Description | : | A text description of the data that the series represents.
StartTime | : | The start time of a time series.
EndTime | : | The end time of a time series.
TimeSeriesDataType | : | The time series data type.
DataOrigin | : | The origin of a time series data.
UserDefinedDataOrigin | : | Value of the data origin if DataOrigin attribute is USERDEFINED.
Unit | : | 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.

Inheritance Graph:

ENTITY IfcTimeSeries

| ENTITY IfcTimeSeries

Name | : | IfcLabel;
Description | : | OPTIONAL IfcStrippedOptional;
StartTime | : | IfcDateTime;
EndTime | : | IfcDateTime;
TimeSeriesDataType | : | IfcTimeSeriesDataTypeEnum;
DataOrigin | : | IfcDataOriginEnum;
UserDefinedDataOrigin | : | OPTIONAL IfcStrippedOptional;
Unit | : | OPTIONAL IfcStrippedOptional;

| INVERSE

END_ENTITY;

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