IfcRegularTimeSeries

BACnet MVD

#### IfcRegularTimeSeries

Natural language names

| Serie mit regelmäßigen Zeitabständen
| Regular Time Series
| Séries temporelles régulières

Change log

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 | B
--- | --- | --- | --- | --- | ---
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 | B
--- | --- | --- | --- | --- | ---
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

##### Definitions applying to BACnet View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcTimeSeries
| Property Sets for Objects | Property Sets for Objects | BACnet View

##### 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

`

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