IfcInventory

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcInventory
OwnerHistory			MODIFIED	Instantiation changed to OPTIONAL.
PredefinedType		X	MODIFIED	Name changed from InventoryType to PredefinedType. Instantiation changed to OPTIONAL.
Jurisdiction			MODIFIED	Instantiation changed to OPTIONAL.
ResponsiblePersons			MODIFIED	Instantiation changed to OPTIONAL.
LastUpdateDate	X	X	MODIFIED	Type changed from IfcCalendarDate to IfcDate. Instantiation changed to OPTIONAL.

Semantic definitions at the entity

Entity definition

An inventory is a list of items within an enterprise.

Various types of inventory can be included. These are identified by the range of values within the inventory type enumeration which includes space, asset, and furniture. User defined inventories can also be defined for lists of particular types of element such as may be required in operating and maintenance instructions. Such inventories should be constrained to contain a list of elements of a restricted type.

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

HISTORY New entity in IFC2.0.

IFC4 CHANGE All attributes optional, Where Rule removed.

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
6	PredefinedType	IfcInventoryTypeEnum	[0:1]	A list of the types of inventories from which that required may be selected.	X
7	Jurisdiction	IfcActorSelect	[0:1]	The organizational unit to which the inventory is applicable.	X
8	ResponsiblePersons	IfcPerson	S[1:?]	Persons who are responsible for the inventory.	X
9	LastUpdateDate	IfcDate	[0:1]	The date on which the last update of the inventory was carried out.	X
10	CurrentValue	IfcCostValue	[0:1]	An estimate of the current cost value of the inventory.	X
11	OriginalValue	IfcCostValue	[0:1]	An estimate of the original cost value of the inventory.	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
IfcInventory
6	PredefinedType	IfcInventoryTypeEnum	[0:1]	A list of the types of inventories from which that required may be selected.	X
7	Jurisdiction	IfcActorSelect	[0:1]	The organizational unit to which the inventory is applicable.	X
8	ResponsiblePersons	IfcPerson	S[1:?]	Persons who are responsible for the inventory.	X
9	LastUpdateDate	IfcDate	[0:1]	The date on which the last update of the inventory was carried out.	X
10	CurrentValue	IfcCostValue	[0:1]	An estimate of the current cost value of the inventory.	X
11	OriginalValue	IfcCostValue	[0:1]	An estimate of the original cost value of the inventory.	X

Definitions applying to Common Use Definitions

Instance diagram

Concept usage

Group Assignment

The Group Assignment concept applies to this entity as shown in Table 238.

RelatedType	Description
	Assets included in the inventory.

Table 238 — IfcInventory 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
IfcInventory
	Group Assignment	Common Use Definitions

Formal representations

XSD Specification

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

 <xs:complexType name="IfcInventory">

  <xs:complexContent>

   <xs:extension base="ifc:IfcGroup">

    <xs:sequence>

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

      <xs:complexType>

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

      </xs:complexType>

     </xs:element>

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

      <xs:complexType>

       <xs:sequence>

        <xs:element ref="ifc:IfcPerson" maxOccurs="unbounded"/>

       </xs:sequence>

       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcPerson"/>

       <xs:attribute ref="ifc:cType" fixed="set"/>

       <xs:attribute ref="ifc:arraySize" use="optional"/>

      </xs:complexType>

     </xs:element>

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

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

    </xs:sequence>

    <xs:attribute name="PredefinedType" type="ifc:IfcInventoryTypeEnum" use="optional"/>

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

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcInventory

 SUBTYPE OF (IfcGroup);

  PredefinedType : OPTIONAL IfcInventoryTypeEnum;

  Jurisdiction : OPTIONAL IfcActorSelect;

  ResponsiblePersons : OPTIONAL SET [1:?] OF IfcPerson;

  LastUpdateDate : OPTIONAL IfcDate;

  CurrentValue : OPTIONAL IfcCostValue;

  OriginalValue : OPTIONAL IfcCostValue;

END_ENTITY;

 EXPRESS-G diagram

Link to this page

	Inventar
	Inventory
	Inventaire