IfcSubContractResource

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcSubContractResource
OwnerHistory			MODIFIED	Instantiation changed to OPTIONAL.
Identification		X	MODIFIED	Name changed from ResourceIdentifier to Identification.
LongDescription			MODIFIED	Name changed from ResourceGroup to LongDescription. Type changed from IfcLabel to IfcText.
Usage	X	X	MODIFIED	Name changed from ResourceConsumption to Usage. Type changed from IfcResourceConsumptionEnum to IfcResourceTime.
BaseCosts	X	X	MODIFIED	Name changed from BaseQuantity to BaseCosts. Type changed from IfcMeasureWithUnit to IfcAppliedValue. Aggregation changed from NONE to LIST.
BaseQuantity	X	X	MODIFIED	Name changed from SubContractor to BaseQuantity. Type changed from IfcActorSelect to IfcPhysicalQuantity.
PredefinedType	X	X	MODIFIED	Name changed from JobDescription to PredefinedType. Type changed from IfcText to IfcSubContractResourceTypeEnum.

Semantic definitions at the entity

Entity definition

IfcSubContractResource is a construction resource needed in a construction process that represents a sub-contractor.

HISTORY New entity in IFC2.0.

IFC4 CHANGE The attribute SubContractor has been deleted; use IfcRelAssignsToResource to assign an IfcActor to fulfill the role as the subcontractor. The attribute JobDescription has been deleted; use LongDescription to describe the job.

An IfcSubContractResource can be used in cost estimating and work planning with or without specifying the subcontractor and contract agreement.

The purpose of an IfcSubContractResource is to indicate work of a particular type that is that is to be engaged through the use of a sub-contract. Its aim is to identify the description of the sub-contract work required. It can be used to identify the generic type of sub-contract resource that is required for a purpose without having to be specific about the actor (person or organization) providing the resource occurrence. It may be particularly useful when creating an overall plan for a process or processes. For instance, within maintenance or work planning there may be a known task that needs to be done which is planned to require an 'insulation specialist'.

A subcontract resource may be described at various stages and levels of detail through its assignments:

Subcontract resource designated for particular tasks
Actors identified to request bids
Cost schedules (bids) received from actors
Project order (work order, change order, etc.) executed

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
11	PredefinedType	IfcSubContractResourceTypeEnum	[0:1]	Defines types of subcontract resources.	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
IfcResource
6	Identification	IfcIdentifier	[0:1]	An identifying designation given to a resource. It is the identifier at the occurrence level.	X
7	LongDescription	IfcText	[0:1]	A detailed description of the resource (e.g. the skillset for a labor resource).	X
	ResourceOf	IfcRelAssignsToResource @RelatingResource	S[0:?]	Set of relationships to other objects, e.g. products, processes, controls, resources or actors, for which this resource object is a resource.	X
IfcConstructionResource
8	Usage	IfcResourceTime	[0:1]	Indicates the work, usage, and times scheduled and completed. Some attributes on this object may have associated constraints or time series; see documentation of IfcResourceTime for specific usage. If the resource is nested, then certain values may be calculated based on the component resources as indicated at IfcResourceTime.	X
9	BaseCosts	IfcAppliedValue	L[1:?]	Indicates the unit costs for which accrued amounts should be calculated. Such unit costs may be split into Name designations (for example, 'Standard', 'Overtime'), and may contain a hierarchy of cost values that apply at different dates (using IfcCostValue.ApplicableDate and IfcCostValue.FixedUntilDate).	X
10	BaseQuantity	IfcPhysicalQuantity	[0:1]	Identifies the base quantity consumed of the resource relative to assignments. For crew, labour, subcontract, and equipment resources, this refers to IfcQuantityTime. For material resources, this refers to IfcQuantityVolume. For product resources, this refers to IfcQuantityCount.	X
IfcSubContractResource
11	PredefinedType	IfcSubContractResourceTypeEnum	[0:1]	Defines types of subcontract resources.	X

Definitions applying to Common Use Definitions

Instance diagram

Concept usage

Object Typing

The Object Typing concept applies to this entity as shown in Table 311.

Type
IfcConstructionResourceType

Table 311 — IfcSubContractResource Object Typing

Resource Assignment

The Resource Assignment concept applies to this entity as shown in Table 312.

Type	Description
IfcActor	Indicates a specific organization to be considered to fulfill the resource or invited to bid on the resource.

Table 312 — IfcSubContractResource Resource 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
IfcConstructionResource
	Document Association	Common Use Definitions
	Constraint Association	Common Use Definitions
	Property Sets for Objects	Common Use Definitions
	Object Nesting	Common Use Definitions
IfcSubContractResource
	Object Typing	Common Use Definitions
	Resource Assignment	Common Use Definitions

Formal representations

XSD Specification

 <xs:element name="IfcSubContractResource" type="ifc:IfcSubContractResource" substitutionGroup="ifc:IfcConstructionResource" nillable="true"/>

 <xs:complexType name="IfcSubContractResource">

  <xs:complexContent>

   <xs:extension base="ifc:IfcConstructionResource">

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

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcSubContractResource

 SUBTYPE OF (IfcConstructionResource);

  PredefinedType : OPTIONAL IfcSubContractResourceTypeEnum;

 WHERE

  CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR 
 (PredefinedType <> IfcSubContractResourceTypeEnum.USERDEFINED) OR 
 ((PredefinedType = IfcSubContractResourceTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
END_ENTITY;

 EXPRESS-G diagram

Link to this page

	Unterauftragnehmer - Ressource
	Sub Contract Resource
	Ressource de sous-traitance