IfcTimePeriod

BACnet MVD

#### IfcTimePeriod

Natural language names

| Zeitperiode
| Time Period
| Période temporelle

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcTimePeriod |  |  | ADDED |

##### Semantic definitions at the entity

Entity definition

IfcTimePeriod defines a time period given by a start and end time. Both time definitions consider the time zone and allow for the daylight savings offset.

A time period is defined by a start and an end time, which is defined by IfcTime. The given time period should be within reasonable values (for example, the start time must be before the end time). It is furthermore expected that both time definitions use the same time zone and, if given, the same daylight saving offset.

> HISTORY New entity in IFC4.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
1 | StartTime | IfcTime |  | Start time of the time period. |  | X
2 | EndTime | IfcTime |  | End time of the time period. |  | X

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcTimePeriod
1 | StartTime | IfcTime |  | Start time of the time period. |  | X
2 | EndTime | IfcTime |  | End time of the time period. |  | X

##### Formal representations

XML Specification
`<xs:element name="IfcTimePeriod" type="ifc:IfcTimePeriod" substitutionGroup="ifc:Entity" nillable="true"/>
<xs:complexType name="IfcTimePeriod">
<xs:complexContent>
<xs:extension base="ifc:Entity">
<xs:attribute name="StartTime" type="ifc:IfcTime" use="optional"/>
<xs:attribute name="EndTime" type="ifc:IfcTime" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcTimePeriod;
StartTime : IfcTime;
EndTime : IfcTime;
END_ENTITY;

EXPRESS-G diagram

`

References: IfcRecurrencePattern

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