IfcTimeSeries

BACnet MVD

#### IfcTimeSeries

Natural language names

| Serie mit Zeitabständen
| Time Series
| Séries temporelles

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcTimeSeries |  |  | MOVED | Schema changed from IFCTIMESERIESRESOURCE to IFCDATETIMERESOURCE.

##### Semantic definitions at the entity

Entity definition

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.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
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

##### 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

##### Definitions applying to BACnet View

Instance diagram

#####

Concept usage

Property Sets for Objects

The Property Sets for Objects concept template applies to this entity as shown in Table 36.

PsetName | Properties
--- | ---

Pset_BACnetScheduleObject

Template | PropertyName | Value | UpperValue | LowerValue | SetValue | Reference
--- | --- | --- | --- | --- | --- | ---
Single Value | Present Value |  |  |  |  |
Bounded Value | Effective Period | IfcDateTime |  |  |  |
Single Value | Schedule Default |  |  |  |  |
Bounded Value | Priority For Writing | IfcInteger |  |  |  |
Enumerated Value | Status Flags | IfcLabel |  |  |  | PEnum_BACnetStatusFlag
Enumerated Value | Event State | IfcLabel |  |  |  | PEnum_BACnetEventState
Enumerated Value | Reliability | IfcLabel |  |  |  | PEnum_BACnetReliability
Single Value | Out Of Service | IfcBoolean |  |  |  |
Single Value | Out Of Service | IfcBoolean |  |  |  |
Bounded Value | Effective Period | IfcDateTime |  |  |  |
Bounded Value | Priority For Writing | IfcInteger |  |  |  |
Enumerated Value | Status Flags | IfcLabel |  |  |  | PEnum_BACnetStatusFlag
Enumerated Value | Event State | IfcLabel |  |  |  | PEnum_BACnetEventState
Enumerated Value | Reliability | IfcLabel |  |  |  | PEnum_BACnetReliability

Pset_BACnetTrendLogObject

Template | PropertyName | Value | Reference
--- | --- | --- | ---
Single Value | Stop When Full | IfcBoolean |
Single Value | Buffer Size | IfcReal |
Enumerated Value | Log Buffer | IfcLabel | PEnum_BACnetLogRecord
Single Value | Total Record Count | IfcInteger |
Enumerated Value | Logging Type | IfcLabel | PEnum_BACnetLoggingType
Enumerated Value | Status Flags | IfcLabel | PEnum_BACnetStatusFlag
Enumerated Value | Event State | IfcLabel | PEnum_BACnetEventState
Enumerated Value | Status Flags | IfcLabel | PEnum_BACnetStatusFlag
Enumerated Value | Event State | IfcLabel | PEnum_BACnetEventState

Table 36 — IfcTimeSeries Property Sets for Objects

mvdXML Specification
`<?xml version="1.0"?>
<ConceptRoot xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" uuid="53f9ea0d-5633-40b8-8a20-d169a5f02064" name="IfcTimeSeries" status="sample" applicableRootEntity="IfcTimeSeries">
<Concepts>
<Concept uuid="bb35ee78-542d-4daa-ba8e-52fe0c894f36" name="Property Sets for Objects" status="sample" override="false">
<Template ref="f74255a6-0c0e-4f31-84ad-24981db62461" />
<Requirements>
<Requirement applicability="import" requirement="mandatory" exchangeRequirement="b8a611d3-6f94-4bdf-b974-b74089a6e6c7" />
<Requirement applicability="export" requirement="mandatory" exchangeRequirement="b8a611d3-6f94-4bdf-b974-b74089a6e6c7" />
</Requirements>
<TemplateRules operator="and">
<TemplateRule Parameters="PsetName[Value]='Pset_BACnetScheduleObject'" />
<TemplateRule Parameters="PsetName[Value]='Pset_BACnetTrendLogObject'" />
</TemplateRules>
</Concept>
</Concepts>
</ConceptRoot>
`
Concept inheritance

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

##### Formal representations

XML 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:sequence>
<xs:element name="Unit" nillable="true" minOccurs="0">
<xs:complexType>
<xs:group ref="ifc:IfcUnit"/>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="Name" type="ifc:IfcLabel" use="optional"/>
<xs:attribute name="Description" type="ifc:IfcText" 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:attribute name="UserDefinedDataOrigin" type="ifc:IfcLabel" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcTimeSeries
ABSTRACT SUPERTYPE OF(ONEOF(IfcIrregularTimeSeries, IfcRegularTimeSeries));
Name : IfcLabel;
Description : OPTIONAL IfcText;
StartTime : IfcDateTime;
EndTime : IfcDateTime;
TimeSeriesDataType : IfcTimeSeriesDataTypeEnum;
DataOrigin : IfcDataOriginEnum;
UserDefinedDataOrigin : OPTIONAL IfcLabel;
Unit : OPTIONAL IfcUnit;
INVERSE
HasExternalReference : SET [1:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects;
END_ENTITY;

EXPRESS-G diagram

`

References: IfcMetricValueSelect IfcResourceObjectSelect IfcObjectReferenceSelect

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