IfcAsset

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcAsset
OwnerHistory			MODIFIED	Instantiation changed to OPTIONAL.
Identification		X	MODIFIED	Name changed from AssetID to Identification. Instantiation changed to OPTIONAL.
OriginalValue			MODIFIED	Instantiation changed to OPTIONAL.
CurrentValue			MODIFIED	Instantiation changed to OPTIONAL.
TotalReplacementCost			MODIFIED	Instantiation changed to OPTIONAL.
Owner			MODIFIED	Instantiation changed to OPTIONAL.
User			MODIFIED	Instantiation changed to OPTIONAL.
ResponsiblePerson			MODIFIED	Instantiation changed to OPTIONAL.
IncorporationDate	X	X	MODIFIED	Type changed from IfcCalendarDate to IfcDate. Instantiation changed to OPTIONAL.
DepreciatedValue			MODIFIED	Instantiation changed to OPTIONAL.

Semantic definitions at the entity

Entity 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.

HISTORY New entity in IFC2x.

IFC4 CHANGE All attributes made optional and date values changed to use IfcDate.

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
6	Identification	IfcIdentifier	[0:1]	A unique identification assigned to an asset that enables its differentiation from other assets. NOTE The asset identifier is unique within the asset register. It differs from the globally unique id assigned to the instance of an entity populating a database.	X
7	OriginalValue	IfcCostValue	[0:1]	The cost value of the asset at the time of purchase.	X
8	CurrentValue	IfcCostValue	[0:1]	The current cost value of the asset.	X
9	TotalReplacementCost	IfcCostValue	[0:1]	The total cost of replacement of the asset.	X
10	Owner	IfcActorSelect	[0:1]	The name of the person or organization that 'owns' the asset.	X
11	User	IfcActorSelect	[0:1]	The name of the person or organization that 'uses' the asset.	X
12	ResponsiblePerson	IfcPerson	[0:1]	The person designated to be responsible for the asset. NOTE In some regulations (for example, UK Health and Safety at Work Act, Electricity at Work Regulations), management of assets must have a person identified as being responsible and to whom regulatory, insurance and other organizations communicate. In places where there is not a legal requirement, the responsible person would be the asset manager but would not have a legal status.	X
13	IncorporationDate	IfcDate	[0:1]	The date on which an asset was incorporated into the works, installed, constructed, erected or completed. NOTE This is the date on which an asset is considered to start depreciating.	X
14	DepreciatedValue	IfcCostValue	[0:1]	The current value of an asset within the accounting rules and procedures of an organization.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcRoot
1	GlobalId	IfcGloballyUniqueId	[1:1]	Assignment of a globally unique identifier within the entire software world.	X
2	OwnerHistory	IfcOwnerHistory	[0:1]	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.	X
3	Name	IfcLabel	[0:1]	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
4	Description	IfcText	[0:1]	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).	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).	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.	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).	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).	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
IfcObject
5	ObjectType	IfcLabel	[0:1]	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.	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.	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.	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.	X
IfcGroup
	IsGroupedBy	IfcRelAssignsToGroup @RelatingGroup	S[0:?]	Reference to the relationship IfcRelAssignsToGroup that assigns the one to many group members to the IfcGroup object.	X
IfcAsset
6	Identification	IfcIdentifier	[0:1]	A unique identification assigned to an asset that enables its differentiation from other assets. NOTE The asset identifier is unique within the asset register. It differs from the globally unique id assigned to the instance of an entity populating a database.	X
7	OriginalValue	IfcCostValue	[0:1]	The cost value of the asset at the time of purchase.	X
8	CurrentValue	IfcCostValue	[0:1]	The current cost value of the asset.	X
9	TotalReplacementCost	IfcCostValue	[0:1]	The total cost of replacement of the asset.	X
10	Owner	IfcActorSelect	[0:1]	The name of the person or organization that 'owns' the asset.	X
11	User	IfcActorSelect	[0:1]	The name of the person or organization that 'uses' the asset.	X
12	ResponsiblePerson	IfcPerson	[0:1]	The person designated to be responsible for the asset. NOTE In some regulations (for example, UK Health and Safety at Work Act, Electricity at Work Regulations), management of assets must have a person identified as being responsible and to whom regulatory, insurance and other organizations communicate. In places where there is not a legal requirement, the responsible person would be the asset manager but would not have a legal status.	X
13	IncorporationDate	IfcDate	[0:1]	The date on which an asset was incorporated into the works, installed, constructed, erected or completed. NOTE This is the date on which an asset is considered to start depreciating.	X
14	DepreciatedValue	IfcCostValue	[0:1]	The current value of an asset within the accounting rules and procedures of an organization.	X

Definitions applying to Common Use Definitions

Instance diagram

Concept usage

Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 232.

PredefinedType

Name

Properties

Pset_Asset

Enumerated Value

Name	Value	Value
AssetAccountingType	IfcLabel	IfcLabel
AssetTaxType	IfcLabel	IfcLabel
AssetInsuranceType	IfcLabel	IfcLabel

Table 232 — IfcAsset Property Sets for Objects

Classification Association

The Classification Association concept applies to this entity.

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. It can classify who owns and is responsible for the asset. Operating function can be designated through the use of one or more classification references.

Group Assignment

The Group Assignment concept applies to this entity as shown in Table 233.

RelatedType	Description
	Physical elements that comprise the asset.

Table 233 — IfcAsset Group Assignment

Concept inheritance

#	Concept	Model View
IfcRoot
	Software Identity	Common Use Definitions
	Revision Control	Common Use Definitions
IfcObject
	Object Occurrence Predefined Type	Common Use Definitions
IfcGroup
IfcAsset
	Property Sets for Objects	Common Use Definitions
	Classification Association	Common Use Definitions
	Group Assignment	Common Use Definitions

Formal representations

XSD Specification

 <xs:element name="IfcAsset" type="ifc:IfcAsset" substitutionGroup="ifc:IfcGroup" nillable="true"/>

 <xs:complexType name="IfcAsset">

  <xs:complexContent>

   <xs:extension base="ifc:IfcGroup">

    <xs:sequence>

     <xs:element name="OriginalValue" type="ifc:IfcCostValue" nillable="true" minOccurs="0"/>

     <xs:element name="CurrentValue" type="ifc:IfcCostValue" nillable="true" minOccurs="0"/>

     <xs:element name="TotalReplacementCost" type="ifc:IfcCostValue" nillable="true" minOccurs="0"/>

     <xs:element name="Owner" nillable="true" minOccurs="0">

      <xs:complexType>

       <xs:group ref="ifc:IfcActorSelect"/>

      </xs:complexType>

     </xs:element>

     <xs:element name="User" nillable="true" minOccurs="0">

      <xs:complexType>

       <xs:group ref="ifc:IfcActorSelect"/>

      </xs:complexType>

     </xs:element>

     <xs:element name="ResponsiblePerson" type="ifc:IfcPerson" nillable="true" minOccurs="0"/>

     <xs:element name="DepreciatedValue" type="ifc:IfcCostValue" nillable="true" minOccurs="0"/>

    </xs:sequence>

    <xs:attribute name="Identification" type="ifc:IfcIdentifier" use="optional"/>

    <xs:attribute name="IncorporationDate" type="ifc:IfcDate" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


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;

 EXPRESS-G diagram

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