IfcEvent

BACnet MVD

#### IfcEvent

Natural language names

| Ereignis
| Event
| Evènement

Change log

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

##### Semantic definitions at the entity

Entity definition

An IfcEvent is something that happens that triggers an action or response.

> HISTORY New entity in IFC4

Use definitions

IfcEvent is used to capture information about particular things that happen or that may happen. Particularly used in work plans (or process maps) they identify e.g. a point at which a message containing information may be issued or at which a rule or constraint is invoked.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
8 | PredefinedType | IfcEventTypeEnum | ? | Identifies the predefined types of an event from which the type required may be set. |  | X
9 | EventTriggerType | IfcEventTriggerTypeEnum | ? | Identifies the predefined types of event trigger from which the type required may be set. |  | X
10 | UserDefinedEventTriggerType | IfcLabel | ? | A user defined event trigger type, the value of which is asserted when the value of an event trigger type is declared as USERDEFINED. |  | X
11 | EventOccurenceTime | IfcEventTime | ? | The date and/or time at which an event occurs. |  | X

Formal Propositions

Rule | Description
--- | ---
CorrectPredefinedType | Either the PredefinedType attribute is unset, or the inherited attribute ObjectType must be asserted when the value of PredefinedType is set to USERDEFINED.
CorrectTypeAssigned | Either the EventTriggerType attribute is unset, or the attribute UserDefinedEventTriggerType must be asserted when the value of EventTriggerType is set to USERDEFINED.

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcRoot
1 | GlobalId | IfcGloballyUniqueId |  | Assignment of a globally unique identifier within the entire software world. | X | X

2

OwnerHistory

IfcOwnerHistory

?

Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,

> NOTE only the last modification in stored - either as addition, deletion or modification.

> IFC4 CHANGE The attribute has been changed to be OPTIONAL.

X

X

3 | Name | IfcLabel | ? | Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule. | X | X
4 | Description | IfcText | ? | Optional description, provided for exchanging informative comments. |  | X
IfcObjectDefinition
| HasAssignments | IfcRelAssigns @RelatedObjects | S[0:?] | Reference to the relationship objects, that assign (by an association relationship) other subtypes of IfcObject to this object instance. Examples are the association to products, processes, controls, resources or groups. |  | X

Nests

IfcRelNests
@RelatedObjects

S[0:1]

References to the decomposition relationship being a nesting. It determines that this object definition is a part within an ordered whole/part decomposition relationship. An object occurrence or type can only be part of a single decomposition (to allow hierarchical strutures only).

> IFC4 CHANGE The inverse attribute datatype has been added and separated from Decomposes defined at IfcObjectDefinition.

X

IsNestedBy

IfcRelNests
@RelatingObject

S[0:?]

References to the decomposition relationship being a nesting. It determines that this object definition is the whole within an ordered whole/part decomposition relationship. An object or object type can be nested by several other objects (occurrences or types).

> IFC4 CHANGE The inverse attribute datatype has been added and separated from IsDecomposedBy defined at IfcObjectDefinition.

X

X

HasContext

IfcRelDeclares
@RelatedDefinitions

S[0:1]

References to the context providing context information such as project unit or representation context. It should only be asserted for the uppermost non-spatial object.

> IFC4 CHANGE The inverse attribute datatype has been added.

X

IsDecomposedBy

IfcRelAggregates
@RelatingObject

S[0:?]

References to the decomposition relationship being an aggregation. It determines that this object definition is whole within an unordered whole/part decomposition relationship. An object definitions can be aggregated by several other objects (occurrences or parts).

> IFC4 CHANGE The inverse attribute datatype has been changed from the supertype IfcRelDecomposes to subtype IfcRelAggregates.

X

X

Decomposes

IfcRelAggregates
@RelatedObjects

S[0:1]

References to the decomposition relationship being an aggregation. It determines that this object definition is a part within an unordered whole/part decomposition relationship. An object definitions can only be part of a single decomposition (to allow hierarchical strutures only).

> IFC4 CHANGE The inverse attribute datatype has been changed from the supertype IfcRelDecomposes to subtype IfcRelAggregates.

X

X

| HasAssociations | IfcRelAssociates @RelatedObjects | S[0:?] | Reference to the relationship objects, that associates external references or other resource definitions to the object.. Examples are the association to library, documentation or classification. | X | X
IfcObject

5

ObjectType

IfcLabel

?

The type denotes a particular type that indicates the object further. The use has to be established at the level of instantiable subtypes. In particular it holds the user defined type, if the enumeration of the attribute PredefinedType is set to USERDEFINED.

X

IsDeclaredBy

IfcRelDefinesByObject
@RelatedObjects

S[0:1]

Link to the relationship object pointing to the declaring object that provides the object definitions for this object occurrence. The declaring object has to be part of an object type decomposition. The associated IfcObject, or its subtypes, contains the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes.

> IFC4 CHANGE New inverse relationship, change made with upward compatibility for file based exchange.

X

X

Declares

IfcRelDefinesByObject
@RelatingObject

S[0:?]

Link to the relationship object pointing to the reflected object(s) that receives the object definitions. The reflected object has to be part of an object occurrence decomposition. The associated IfcObject, or its subtypes, provides the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes.

> IFC4 CHANGE New inverse relationship, change made with upward compatibility for file based exchange.

X

IsTypedBy

IfcRelDefinesByType
@RelatedObjects

S[0:1]

Set of relationships to the object type that provides the type definitions for this object occurrence. The then associated IfcTypeObject, or its subtypes, contains the specific information (or type, or style), that is common to all instances of IfcObject, or its subtypes, referring to the same type.

> IFC4 CHANGE New inverse relationship, the link to IfcRelDefinesByType had previously be included in the inverse relationship IfcRelDefines. Change made with upward compatibility for file based exchange.

X

IsDefinedBy

IfcRelDefinesByProperties
@RelatedObjects

S[0:?]

Set of relationships to property set definitions attached to this object. Those statically or dynamically defined properties contain alphanumeric information content that further defines the object.

> IFC4 CHANGE The data type has been changed from IfcRelDefines to IfcRelDefinesByProperties with upward compatibility for file based exchange.

X

IfcProcess

6

Identification

IfcIdentifier

?

An identifying designation given to a process or activity. It is the identifier at the occurrence level.

> IFC4 CHANGE Attribute promoted from subtypes.

X

7

LongDescription

IfcText

?

An extended description or narrative that may be provided.

> IFC4 CHANGE New attribute.

X

| IsPredecessorTo | IfcRelSequence @RelatingProcess | S[0:?] | Dependency between two activities, it refers to the subsequent activity for which this activity is the predecessor. The link between two activities can include a link type and a lag time. |  | X
| IsSuccessorFrom | IfcRelSequence @RelatedProcess | S[0:?] | Dependency between two activities, it refers to the previous activity for which this activity is the successor. The link between two activities can include a link type and a lag time. |  | X
| OperatesOn | IfcRelAssignsToProcess @RelatingProcess | S[0:?] | Set of relationships to other objects, e.g. products, processes, controls, resources or actors, that are operated on by the process. |  | X
IfcEvent
8 | PredefinedType | IfcEventTypeEnum | ? | Identifies the predefined types of an event from which the type required may be set. |  | X
9 | EventTriggerType | IfcEventTriggerTypeEnum | ? | Identifies the predefined types of event trigger from which the type required may be set. |  | X
10 | UserDefinedEventTriggerType | IfcLabel | ? | A user defined event trigger type, the value of which is asserted when the value of an event trigger type is declared as USERDEFINED. |  | X
11 | EventOccurenceTime | IfcEventTime | ? | The date and/or time at which an event occurs. |  | X

##### Definitions applying to Design Transfer View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### 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 3.

PsetName | Properties
--- | ---

Pset_BACnetEventEnrollmentObject

Template | PropertyName | Value | Reference
--- | --- | --- | ---
Enumerated Value | EventType | IfcLabel | PEnum_BACnetEventType
Enumerated Value | NotifyType | IfcLabel | PEnum_BACnetNotifyType
Enumerated Value | EventParameters | IfcLabel | PEnum_BACnetEventParameter
Enumerated Value | ObjectPropertyReference | IfcLabel | PEnum_BACnetDeviceObjectPropertyReference
Enumerated Value | EventState | IfcLabel | PEnum_BACnetEventState
Enumerated Value | EventEnable | IfcLabel | PEnum_BACnetEventTransitionBits
Enumerated Value | AckedTransitions | IfcLabel | PEnum_BACnetEventTransitionBits
Enumerated Value | EventTimeStamps | IfcLabel | PEnum_BACnetEventTimeStamp
Single Value | EventDetectionEnable | IfcBoolean |
Enumerated Value | StatusFlags | IfcLabel | PEnum_BACnetStatusFlag
Enumerated Value | Reliability | IfcLabel | PEnum_BACnetReliability
Enumerated Value | NotifyType | IfcLabel | PEnum_BACnetNotifyType
Enumerated Value | EventParameters | IfcLabel | PEnum_BACnetEventParameter
Enumerated Value | ObjectPropertyReference | IfcLabel | PEnum_BACnetDeviceObjectPropertyReference
Enumerated Value | EventState | IfcLabel | PEnum_BACnetEventState
Enumerated Value | EventEnable | IfcLabel | PEnum_BACnetEventTransitionBits
Enumerated Value | AckedTransitions | IfcLabel | PEnum_BACnetEventTransitionBits
Enumerated Value | EventTimeStamps | IfcLabel | PEnum_BACnetEventTimeStamp
Enumerated Value | StatusFlags | IfcLabel | PEnum_BACnetStatusFlag
Enumerated Value | Reliability | IfcLabel | PEnum_BACnetReliability

Table 3 — IfcEvent Property Sets for Objects

BACnet-Event Assign to Controller

The BACnet-Event Assign to Controller concept applies to this entity.

BACnet ObjectDefinition Composition

The BACnet ObjectDefinition Composition concept applies to this entity.

Software Identity

The Software Identity concept applies to this entity.

Object User Identity

The Object User Identity concept applies to this entity.

BACnet-Procedure Assign to Event

The BACnet-Procedure Assign to Event concept applies to this entity.

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="c5b19e9c-ff20-4ef8-b561-4df6737de674" name="IfcEvent" status="sample" applicableRootEntity="IfcEvent">
<Concepts>
<Concept uuid="9ad07d6f-3b26-4300-8f0e-d621490631db" 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_BACnetEventEnrollmentObject'" />
</TemplateRules>
</Concept>
<Concept uuid="63cb3605-8a08-43b5-b362-47485fae02be" name="BACnet-Event Assign to Controller" status="sample" override="false">
<Template ref="60fd7d70-9223-49d0-a626-de0b4bd20d8a" />
<Requirements>
<Requirement applicability="import" requirement="mandatory" exchangeRequirement="b8a611d3-6f94-4bdf-b974-b74089a6e6c7" />
<Requirement applicability="export" requirement="mandatory" exchangeRequirement="b8a611d3-6f94-4bdf-b974-b74089a6e6c7" />
</Requirements>
</Concept>
<Concept uuid="27b03df5-28e2-4d68-a422-86480e770cb2" name="BACnet ObjectDefinition Composition" status="sample" override="false">
<Template ref="c8ce5b1b-84be-4e74-971f-0f7a5e0a654b" />
<Requirements>
<Requirement applicability="import" requirement="recommended" exchangeRequirement="b8a611d3-6f94-4bdf-b974-b74089a6e6c7" />
<Requirement applicability="export" requirement="recommended" exchangeRequirement="b8a611d3-6f94-4bdf-b974-b74089a6e6c7" />
</Requirements>
</Concept>
<Concept uuid="0edf5242-d27a-476a-af0d-b37e5b33d5ba" name="Software Identity" status="sample" override="false">
<Template ref="f7cb0a08-fee7-4cc0-85fe-43f6a6a0bce1" />
<Requirements>
<Requirement applicability="import" requirement="mandatory" exchangeRequirement="b8a611d3-6f94-4bdf-b974-b74089a6e6c7" />
<Requirement applicability="export" requirement="mandatory" exchangeRequirement="b8a611d3-6f94-4bdf-b974-b74089a6e6c7" />
</Requirements>
</Concept>
<Concept uuid="43fad163-34b4-417b-ab26-243b7cbb4bd3" name="Object User Identity" status="sample" override="false">
<Template ref="c19ec186-9cfd-47fc-a4d4-9fb35008d04a" />
<Requirements>
<Requirement applicability="import" requirement="mandatory" exchangeRequirement="b8a611d3-6f94-4bdf-b974-b74089a6e6c7" />
<Requirement applicability="export" requirement="mandatory" exchangeRequirement="b8a611d3-6f94-4bdf-b974-b74089a6e6c7" />
</Requirements>
</Concept>
<Concept uuid="95695680-daac-40fd-a611-9ee60894705d" name="BACnet-Procedure Assign to Event" status="sample" override="false">
<Template ref="bc89a35a-1295-4901-b612-7463c32e5aa8" />
<Requirements>
<Requirement applicability="import" requirement="mandatory" exchangeRequirement="b8a611d3-6f94-4bdf-b974-b74089a6e6c7" />
<Requirement applicability="export" requirement="mandatory" exchangeRequirement="b8a611d3-6f94-4bdf-b974-b74089a6e6c7" />
</Requirements>
</Concept>
</Concepts>
</ConceptRoot>
`
Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View
IfcEvent
| Property Sets for Objects | Property Sets for Objects | BACnet View
| BACnet-Event Assign to Controller | BACnet-Event Assign to Controller | BACnet View
| BACnet ObjectDefinition Composition | BACnet ObjectDefinition Composition | BACnet View
| Software Identity | Software Identity | BACnet View
| Object User Identity | Object User Identity | BACnet View
| BACnet-Procedure Assign to Event | BACnet-Procedure Assign to Event | BACnet View

##### Formal representations

XML Specification
`<xs:element name="IfcEvent" type="ifc:IfcEvent" substitutionGroup="ifc:IfcProcess" nillable="true"/>
<xs:complexType name="IfcEvent">
<xs:complexContent>
<xs:extension base="ifc:IfcProcess">
<xs:sequence>
<xs:element name="EventOccurenceTime" type="ifc:IfcEventTime" nillable="true" minOccurs="0"/>
</xs:sequence>
<xs:attribute name="PredefinedType" type="ifc:IfcEventTypeEnum" use="optional"/>
<xs:attribute name="EventTriggerType" type="ifc:IfcEventTriggerTypeEnum" use="optional"/>
<xs:attribute name="UserDefinedEventTriggerType" type="ifc:IfcLabel" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcEvent
SUBTYPE OF (IfcProcess);
PredefinedType : OPTIONAL IfcEventTypeEnum;
EventTriggerType : OPTIONAL IfcEventTriggerTypeEnum;
UserDefinedEventTriggerType : OPTIONAL IfcLabel;
EventOccurenceTime : OPTIONAL IfcEventTime;
WHERE
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcEventTypeEnum.USERDEFINED) OR ((PredefinedType = IfcEventTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcObject.ObjectType));
CorrectTypeAssigned : NOT(EXISTS(EventTriggerType)) OR (EventTriggerType <> IfcEventTriggerTypeEnum.USERDEFINED) OR ((EventTriggerType = IfcEventTriggerTypeEnum.USERDEFINED) AND EXISTS(UserDefinedEventTriggerType));
END_ENTITY;

EXPRESS-G diagram

`

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