IfcIrregularTimeSeries

BACnet MVD

#### IfcIrregularTimeSeries

Natural language names

| Serie mit unregelmäßigen Zeitabständen
| Irregular Time Series
| Séries temporelles irrégulières

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcIrregularTimeSeries |  |  | 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 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

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
9 | Values | IfcIrregularTimeSeriesValue | 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

IfcIrregularTimeSeries
9 | Values | IfcIrregularTimeSeriesValue | 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="IfcIrregularTimeSeries" type="ifc:IfcIrregularTimeSeries" substitutionGroup="ifc:IfcTimeSeries" nillable="true"/>
<xs:complexType name="IfcIrregularTimeSeries">
<xs:complexContent>
<xs:extension base="ifc:IfcTimeSeries">
<xs:sequence>
<xs:element name="Values">
<xs:complexType>
<xs:sequence>
<xs:element ref="ifc:IfcIrregularTimeSeriesValue" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute ref="ifc:itemType" fixed="ifc:IfcIrregularTimeSeriesValue"/>
<xs:attribute ref="ifc:cType" fixed="list"/>
<xs:attribute ref="ifc:arraySize" use="optional"/>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcIrregularTimeSeries
SUBTYPE OF (IfcTimeSeries);
Values : LIST [1:?] OF IfcIrregularTimeSeriesValue;
END_ENTITY;

EXPRESS-G diagram

`

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