IfcSubContractResource

BACnet MVD

#### IfcSubContractResource

Natural language names

| Unterauftragnehmer - Ressource
| Sub Contract Resource
| Ressource de sous-traitance

Change log

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 | B
--- | --- | --- | --- | --- | ---

11

PredefinedType

IfcSubContractResourceTypeEnum

?

Defines types of subcontract resources.

> IFC4 New attribute.

X

##### 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

IfcResource

6

Identification

IfcIdentifier

?

An identifying designation given to a resource. It is the identifier at the occurrence level.

> IFC4 CHANGE Attribute promoted from subtype IfcConstructionResource.

X

7

LongDescription

IfcText

?

A detailed description of the resource (e.g. the skillset for a labor resource).

> IFC4 CHANGE The attribute LongDescription is added replacing the ResourceGroup attribute at subtype IfcConstructionResource.

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

?

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.

> IFC4 CHANGE New attribute.

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).

> IFC4 CHANGE New attribute.

X

10

BaseQuantity

IfcPhysicalQuantity

?

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.

> IFC4 CHANGE New attribute.

X

IfcSubContractResource

11

PredefinedType

IfcSubContractResourceTypeEnum

?

Defines types of subcontract resources.

> IFC4 New attribute.

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

Concept inheritance

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

##### Formal representations

XML 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

`

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