IfcEventTime

Natural language names
Zeitliche Information einers Ereignis
Event Time
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4 4.0.0.0
    IfcEventTimeADDED
Semantic definitions at the entity
Entity definition

IfcEventTime captures the time-related information about an event including the different types of event dates (i.e. actual, scheduled, early, and late).

All given values should be provided by the application, that is, the IFC schema does not deal with dependencies between process time values. At this stage there is also no consistency check through where rules that guarantee a meaningful population of date values. Thus, an application is responsible to provide reasonable values and, if an application receives event dates, has to make consistency checks by their own.

IfcEventTime furthermore provides a generic mechanism to differentiate between user given time values and time values derived from user given time values and other constraints such as work calendars and assigned resources (derived from the process graph). The data origin flag is provided as a single attribute applying to all date time related attributes of IfcEventTime.

HISTORY  New entity in IFC4.

Attribute definitions
#AttributeTypeCardinalityDescription G
4ActualDateIfcDateTime? The date on which an event actually occurs. It is a measured value. X
5EarlyDateIfcDateTime? The earliest date on which an event can occur. It is a calculated value. X
6LateDateIfcDateTime? The latest date on which an event can occur. It is a calculated value. X
7ScheduleDateIfcDateTime? The date on which an event is scheduled to occur. The value might be measured or somehow calculated, which is defined by ScheduleDataOrigin. X
Inherited definitions from supertypes
Entity inheritance IfcSchedulingTime
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcSchedulingTime
1NameIfcLabel? Optional name for the time definition. X
2DataOriginIfcDataOriginEnum? Specifies the origin of the scheduling time entity. It currently differentiates between predicted, simulated, measured, and user defined values. X
3UserDefinedDataOriginIfcLabel? Value of the data origin if DataOrigin attribute is USERDEFINED. X
IfcEventTime
4ActualDateIfcDateTime? The date on which an event actually occurs. It is a measured value. X
5EarlyDateIfcDateTime? The earliest date on which an event can occur. It is a calculated value. X
6LateDateIfcDateTime? The latest date on which an event can occur. It is a calculated value. X
7ScheduleDateIfcDateTime? The date on which an event is scheduled to occur. The value might be measured or somehow calculated, which is defined by ScheduleDataOrigin. X
Formal representations
XML Specification
 <xs:element name="IfcEventTime" type="ifc:IfcEventTime" substitutionGroup="ifc:IfcSchedulingTime" nillable="true"/>
 <xs:complexType name="IfcEventTime">
  <xs:complexContent>
   <xs:extension base="ifc:IfcSchedulingTime">
    <xs:attribute name="ActualDate" type="ifc:IfcDateTime" use="optional"/>
    <xs:attribute name="EarlyDate" type="ifc:IfcDateTime" use="optional"/>
    <xs:attribute name="LateDate" type="ifc:IfcDateTime" use="optional"/>
    <xs:attribute name="ScheduleDate" type="ifc:IfcDateTime" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcEventTime
 SUBTYPE OF (IfcSchedulingTime);
  ActualDate : OPTIONAL IfcDateTime;
  EarlyDate : OPTIONAL IfcDateTime;
  LateDate : OPTIONAL IfcDateTime;
  ScheduleDate : OPTIONAL IfcDateTime;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

References  References: IfcEvent

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