IFC 4.3.0.1 (IFC4X3_TC1)

6.4.3.1 IfcAsset

6.4.3.1.1 Semantic definition

An asset is a uniquely identifiable grouping of elements acting as a single entity that has a financial value or that can be operated on as a single unit.

An asset is generally the level of granularity at which maintenance operations are undertaken. An asset is a group that can contain one or more elements. Whilst the financial value of a component or element can be defined, financial value is also defined for accounting purposes at the level of the asset.

There are a number of actors that can be associated with an asset, each actor having a role. Actors within the scope of the project are indicated using the IfcRelAssignsToActor relationship in which case roles should be defined through the IfcActorRole class; otherwise principal actors are identified as attributes of the class. In the existence of both, direct attributes take precedence.

There are a number of costs that can be associated with an asset, each cost having a role. These are specified through the OriginalValue, CurrentValue, TotalReplacementCost and DepreciatedValue attributes.

6.4.3.1.2 Entity inheritance

6.4.3.1.3 Attributes

# Attribute Type Description
IfcRoot (4)
1 GlobalId IfcGloballyUniqueId

Assignment of a globally unique identifier within the entire software world.

2 OwnerHistory OPTIONAL 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,

3 Name OPTIONAL 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.

4 Description OPTIONAL IfcText

Optional description, provided for exchanging informative comments.

IfcObjectDefinition (7)
HasAssignments SET [0:?] OF IfcRelAssigns FOR RelatedObjects

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.

Nests SET [0:1] OF IfcRelNests FOR RelatedObjects

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).

IsNestedBy SET [0:?] OF IfcRelNests FOR RelatingObject

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).

HasContext SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions

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.

IsDecomposedBy SET [0:?] OF IfcRelAggregates FOR RelatingObject

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).

Decomposes SET [0:1] OF IfcRelAggregates FOR RelatedObjects

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).

HasAssociations SET [0:?] OF IfcRelAssociates FOR RelatedObjects

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.

IfcObject (5)
5 ObjectType OPTIONAL 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 or when the concrete entity instantiated does not have a PredefinedType attribute. The latter is the case in some exceptional leaf classes and when instantiating IfcBuiltElement directly.

IsDeclaredBy SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects

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.

Declares SET [0:?] OF IfcRelDefinesByObject FOR RelatingObject

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.

IsTypedBy SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects

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.

IsDefinedBy SET [0:?] OF IfcRelDefinesByProperties FOR RelatedObjects

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.

IfcGroup (2)
IsGroupedBy SET [0:?] OF IfcRelAssignsToGroup FOR RelatingGroup

Reference to the relationship IfcRelAssignsToGroup that assigns the one to many group members to the IfcGroup object.

ReferencedInStructures SET [0:?] OF IfcRelReferencedInSpatialStructure FOR RelatedElements

Reference to the relationship IfcRelReferencedInSpatialStructure that relates the group to a spatial element.

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IfcAsset (9)
6 Identification OPTIONAL IfcIdentifier

A unique identification assigned to an asset that enables its differentiation from other assets.

7 OriginalValue OPTIONAL IfcCostValue

The cost value of the asset at the time of purchase.

8 CurrentValue OPTIONAL IfcCostValue

The current cost value of the asset.

9 TotalReplacementCost OPTIONAL IfcCostValue

The total cost of replacement of the asset.

10 Owner OPTIONAL IfcActorSelect

The name of the person or organization that 'owns' the asset.

11 User OPTIONAL IfcActorSelect

The name of the person or organization that 'uses' the asset.

12 ResponsiblePerson OPTIONAL IfcPerson

The person designated to be responsible for the asset.

13 IncorporationDate OPTIONAL IfcDate

The date on which an asset was incorporated into the works, installed, constructed, erected or completed.

14 DepreciatedValue OPTIONAL IfcCostValue

The current value of an asset within the accounting rules and procedures of an organization.

Table 6.4.3.1.A

6.4.3.1.4 Property sets

  • Pset_Asset
    • AssetAccountingType
    • AssetTaxType
    • AssetInsuranceType
    • AssetStatus
    • AssetUse
  • Pset_Condition
    • AssessmentDate
    • AssessmentCondition
    • AssessmentDescription
    • AssessmentType
    • AssessmentMethod
    • LastAssessmentReport
    • NextAssessmentDate
    • AssessmentFrequency
  • Pset_InstallationOccurrence
    • InstallationDate
    • AcceptanceDate
    • PutIntoOperationDate
  • Pset_MaintenanceStrategy
    • AssetCriticality
    • AssetFrailty
    • AssetPriority
    • MonitoringType
    • AccidentResponse
  • Pset_MaintenanceTriggerCondition
    • ConditionTargetPerformance
    • ConditionMaintenanceLevel
    • ConditionReplacementLevel
    • ConditionDisposalLevel
  • Pset_MaintenanceTriggerDuration
    • DurationTargetPerformance
    • DurationMaintenanceLevel
    • DurationReplacementLevel
    • DurationDisposalLevel
  • Pset_MaintenanceTriggerPerformance
    • TargetPerformance
    • PerformanceMaintenanceLevel
    • ReplacementLevel
    • DisposalLevel
  • Pset_RepairOccurrence
    • RepairContent
    • RepairDate
    • MeanTimeToRepair
  • Pset_Risk
    • RiskName
    • RiskType
    • NatureOfRisk
    • RiskAssessmentMethodology
    • UnmitigatedRiskLikelihood
    • UnmitigatedRiskConsequence
    • UnmitigatedRiskSignificance
    • MitigationPlanned
    • MitigatedRiskLikelihood
    • MitigatedRiskConsequence
    • MitigatedRiskSignificance
    • MitigationProposed
    • AssociatedProduct
    • AssociatedActivity
    • AssociatedLocation

6.4.3.1.5 Concept usage

Concept Usage Description
IfcRoot (2)
Revision Control General

Ownership, history, and merge state is captured using IfcOwnerHistory.

Software Identity General

IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept.

IfcObjectDefinition (9)
Aggregation General

No description available.

Approval Association General

No description available.

Classification Association General

Any object occurrence or object type can have a reference to a specific classification reference, i.e. to a particular facet within a classification system.

Constraint Association General

No description available.

Document Association General

No description available.

Library Association General

No description available.

Material Association General

No description available.

Material Single General

No description available.

Nesting General

No description available.

IfcObject (5)
Assignment to Group General

No description available.

Object Predefined Type General

No description available.

Object Typing General

Any object occurrence can be typed by being assigned to a common object type utilizing this concept. A particular rule, restricting the applicable subtypes of IfcTypeObject that can be assigned, is introduced by overriding this concept at the level of subtypes of IfcObject.

This concept can be applied to the following resources:

Object User Identity General

An attribute Name and optionally Description can be used for all subypes of IfcObject. For those subtypes, that have an object type definition, such as ifcBeam - IfcBeamType, the common Name and optionally Description is associated with the object type.

Property Sets with Override General

Any object occurrence can hold property sets, either directly at the object occurrence as element specific property sets, or at the object type, as type property sets. In this case, the properties that are provided to the object occurrence are the combinations of element specific and type properties. In case, that the same property (within the same property set, is defined both, in occurrence and type properties, the property value of the occurrence property overrides the property value of the type property.

IfcGroup (2)
Group Assignment General

The IfcGroup establishes an arbitrary collection of objects through utilizing this concept.

Property Sets for Objects General

This concept can be applied to the following resources:

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IfcAsset (3)
Classification Association General

The operating function of an asset within an organization may be particularly valuable in situations where one organization provides and maintains core services and another organization adds and maintains terminal services. Operating function can be designated through the use of one or more classification references.

Group Assignment General

No description available.

Property Sets for Objects General

This concept can be applied to the following resources:

Table 6.4.3.1.B

6.4.3.1.6 Formal representation

ENTITY IfcAsset
 SUBTYPE OF (IfcGroup);
	Identification : OPTIONAL IfcIdentifier;
	OriginalValue : OPTIONAL IfcCostValue;
	CurrentValue : OPTIONAL IfcCostValue;
	TotalReplacementCost : OPTIONAL IfcCostValue;
	Owner : OPTIONAL IfcActorSelect;
	User : OPTIONAL IfcActorSelect;
	ResponsiblePerson : OPTIONAL IfcPerson;
	IncorporationDate : OPTIONAL IfcDate;
	DepreciatedValue : OPTIONAL IfcCostValue;
END_ENTITY;

6.4.3.1.7 References

6.4.3.1.8 Changelog

6.4.3.1.8.1 IFC4

  • where rule, WR1
  • attribute AssetID name, Changed from "AssetID" to "Identification"
  • attribute AssetID optional, Changed from "False" to "True"
  • attribute CurrentValue optional, Changed from "False" to "True"
  • attribute DepreciatedValue optional, Changed from "False" to "True"
  • attribute IncorporationDate optional, Changed from "False" to "True"
  • attribute IncorporationDate type, Changed from "IfcCalendarDate" to "IfcDate"
  • attribute OriginalValue optional, Changed from "False" to "True"
  • attribute Owner optional, Changed from "False" to "True"
  • attribute ResponsiblePerson optional, Changed from "False" to "True"
  • attribute TotalReplacementCost optional, Changed from "False" to "True"
  • attribute User optional, Changed from "False" to "True"