IFC 4.3.0.1 (IFC4X3) development

5.4.3.70 IfcSpatialZone

5.4.3.70.1 Semantic definition

A spatial zone is a non-hierarchical and potentially overlapping decomposition of the project under some functional consideration. A spatial zone might be used to represent a thermal zone, a construction zone, a lighting zone, a usable area zone. A spatial zone might have its independent placement and shape representation.

The IfcSpatialZone inherits and declares these attributes that shall have the following meaning:

  • Name: A number or designator provided by the user or system for the spatial element
  • LongName: Name of the spatial element provided by the user
  • Description: Any additional description provided by the user
  • ObjectType: reserved for typing of spatial elements in case of PredefinedType = .USERDEFINED., restrictions on applicable values might be published in view definitions or implementer agreements.

Physical elements that are referenced by this spatial zone are related using the IfcRelReferencedInSpatialStructure relationship as it is a non-hierarchical assignment in addition to the hierarchical spatial containment within a subtype of IfcSpatialStructureElement. Also spaces, that referenced by this spatial zone are related using the IfcRelReferencedInSpatialStructure relationship. The IfcSpatialZone itself can also be referenced by another spatial element using IfcRelReferencedInSpatialStructure.

5.4.3.70.2 Entity inheritance

5.4.3.70.3 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.

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.

IfcProduct (5)
6 ObjectPlacement OPTIONAL IfcObjectPlacement

This establishes the object coordinate system and placement of the product in space. The placement can either be absolute (relative to the world coordinate system), relative (relative to the object placement of another product), or constrained (e.g. relative to grid axes, or to a linear positioning element). The type of placement is determined by the various subtypes of IfcObjectPlacement. An object placement must be provided if a representation is present.

7 Representation OPTIONAL IfcProductRepresentation

Reference to the representations of the product, being either a representation (IfcProductRepresentation) or as a special case a shape representations (IfcProductDefinitionShape). The product definition shape provides for multiple geometric representations of the shape property of the object within the same object coordinate system, defined by the object placement.

ReferencedBy SET [0:?] OF IfcRelAssignsToProduct FOR RelatingProduct

Reference to the IfcRelAssignsToProduct relationship, by which other products, processes, controls, resources or actors (as subtypes of IfcObjectDefinition) can be related to this product.

PositionedRelativeTo SET [0:?] OF IfcRelPositions FOR RelatedProducts

No description available.

ReferencedInStructures SET [0:?] OF IfcRelReferencedInSpatialStructure FOR RelatedElements

No description available.

IfcSpatialElement (6)
8 LongName OPTIONAL IfcLabel

Long name for a spatial structure element, used for informal purposes. It should be used, if available, in conjunction with the inherited Name attribute.

ContainsElements SET [0:?] OF IfcRelContainedInSpatialStructure FOR RelatingStructure

Set of spatial containment relationships, that holds those elements, which are contained within this element of the project spatial structure.

ServicedBySystems SET [0:?] OF IfcRelServicesBuildings FOR RelatedBuildings

Set of relationships to systems, that provides a certain service to the spatial element for which it is defined. The relationship is handled by the objectified relationship IfcRelServicesBuildings.

ReferencesElements SET [0:?] OF IfcRelReferencedInSpatialStructure FOR RelatingStructure

Set of spatial reference relationships, that holds those elements, which are referenced, but not contained, within this element of the project spatial structure.

IsInterferedByElements SET [0:?] OF IfcRelInterferesElements FOR RelatedElement

Reference to the interference relationship to indicate the spatial element that is interfered. The relationship, if provided, indicates that this spatial element has an interference with one or many other spatial elements.

InterferesElements SET [0:?] OF IfcRelInterferesElements FOR RelatingElement

Reference to the interference relationship to indicate the spatial element that interferes. The relationship, if provided, indicates that this spatial element has an interference with one or many other spatial elements.

Click to show 27 hidden inherited attributes Click to hide 27 inherited attributes
IfcSpatialZone (1)
9 PredefinedType OPTIONAL IfcSpatialZoneTypeEnum

Predefined types to define the particular type of the spatial zone. There may be property set definitions available for each predefined type.

Table 5.4.3.70.A

5.4.3.70.4 Formal propositions

Name Description
CorrectPredefinedType

Either the PredefinedType attribute is unset (e.g. because an IfcSpatialZoneType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.

NOT(EXISTS(PredefinedType)) OR
 (PredefinedType <> IfcSpatialZoneTypeEnum.USERDEFINED) OR
 ((PredefinedType = IfcSpatialZoneTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType))
CorrectTypeAssigned

Either there is no spatial zone type object associated, then the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcSpatialZoneType.

(SIZEOF(IsTypedBy) = 0) OR
  ('IFC4X3_DEV_64d1fa4d.IFCSPATIALZONETYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType))
Table 5.4.3.70.B

5.4.3.70.5 Property sets

  • Pset_AirSideSystemInformation
    • Description
    • AirSideSystemType
    • AirSideSystemDistributionType
    • TotalAirFlow
    • EnergyGainTotal
    • AirFlowSensible
    • EnergyGainSensible
    • EnergyLoss
    • InfiltrationDiversitySummer
    • InfiltrationDiversityWinter
    • ApplianceDiversity
    • HeatingTemperatureDelta
    • CoolingTemperatureDelta
    • Ventilation
    • FanPower
  • Pset_AirSideSystemInformation
    • Description
    • AirSideSystemType
    • AirSideSystemDistributionType
    • TotalAirFlow
    • EnergyGainTotal
    • AirFlowSensible
    • EnergyGainSensible
    • EnergyLoss
    • InfiltrationDiversitySummer
    • InfiltrationDiversityWinter
    • ApplianceDiversity
    • HeatingTemperatureDelta
    • CoolingTemperatureDelta
    • Ventilation
    • FanPower
  • Pset_Risk
    • RiskName
    • RiskType
    • NatureOfRisk
    • RiskAssessmentMethodology
    • UnmitigatedRiskLikelihood
    • UnmitigatedRiskConsequence
    • UnmitigatedRiskSignificance
    • MitigationPlanned
    • MitigatedRiskLikelihood
    • MitigatedRiskConsequence
    • MitigatedRiskSignificance
    • MitigationProposed
    • AssociatedProduct
    • AssociatedActivity
    • AssociatedLocation
  • Pset_SpaceAirHandlingDimensioning
    • CoolingDesignAirFlow
    • HeatingDesignAirFlow
    • SensibleHeatGain
    • TotalHeatGain
    • TotalHeatLoss
    • CoolingDryBulb
    • CoolingRelativeHumidity
    • HeatingDryBulb
    • HeatingRelativeHumidity
    • VentilationDesignAirFlow
    • DesignAirFlow
    • CeilingRAPlenum
    • BoundaryAreaHeatLoss
  • Pset_SpaceCommon
    • Reference
    • IsExternal
    • GrossPlannedArea
    • NetPlannedArea
    • PubliclyAccessible
    • HandicapAccessible
  • Pset_SpaceCoveringRequirements
    • FloorCovering
    • FloorCoveringThickness
    • WallCovering
    • WallCoveringThickness
    • CeilingCovering
    • CeilingCoveringThickness
    • SkirtingBoard
    • SkirtingBoardHeight
    • Molding
    • MoldingHeight
    • ConcealedFlooring
    • ConcealedFlooringOffset
    • ConcealedCeiling
    • ConcealedCeilingOffset
  • Pset_SpaceFireSafetyRequirements
    • FireRiskFactor
    • FlammableStorage
    • FireExit
    • SprinklerProtection
    • SprinklerProtectionAutomatic
    • AirPressurization
  • Pset_SpaceFireSafetyRequirements
    • FireRiskFactor
    • FlammableStorage
    • FireExit
    • SprinklerProtection
    • SprinklerProtectionAutomatic
    • AirPressurization
  • Pset_SpaceHVACDesign
    • TemperatureSetPoint
    • TemperatureMax
    • TemperatureMin
    • TemperatureSummerMax
    • TemperatureSummerMin
    • TemperatureWinterMax
    • TemperatureWinterMin
    • HumiditySetPoint
    • HumidityMax
    • HumidityMin
    • HumiditySummer
    • HumidityWinter
    • DiscontinuedHeating
    • NaturalVentilation
    • NaturalVentilationRate
    • MechanicalVentilation
    • MechanicalVentilationRate
    • AirConditioning
    • AirConditioningCentral
    • AirHandlingName
  • Pset_SpaceHVACDesign
    • TemperatureSetPoint
    • TemperatureMax
    • TemperatureMin
    • TemperatureSummerMax
    • TemperatureSummerMin
    • TemperatureWinterMax
    • TemperatureWinterMin
    • HumiditySetPoint
    • HumidityMax
    • HumidityMin
    • HumiditySummer
    • HumidityWinter
    • DiscontinuedHeating
    • NaturalVentilation
    • NaturalVentilationRate
    • MechanicalVentilation
    • MechanicalVentilationRate
    • AirConditioning
    • AirConditioningCentral
    • AirHandlingName
  • Pset_SpaceLightingDesign
    • ArtificialLighting
    • Illuminance
  • Pset_SpaceLightingDesign
    • ArtificialLighting
    • Illuminance
  • Pset_SpaceOccupancyRequirements
    • OccupancyType
    • OccupancyNumber
    • OccupancyNumberPeak
    • OccupancyTimePerDay
    • AreaPerOccupant
    • MinimumHeadroom
    • IsOutlookDesirable
  • Pset_SpaceOccupancyRequirements
    • OccupancyType
    • OccupancyNumber
    • OccupancyNumberPeak
    • OccupancyTimePerDay
    • AreaPerOccupant
    • MinimumHeadroom
    • IsOutlookDesirable
  • Pset_SpaceThermalLoad
    • People
    • Lighting
    • EquipmentSensible
    • VentilationIndoorAir
    • VentilationOutdoorAir
    • RecirculatedAir
    • ExhaustAir
    • AirExchangeRate
    • DryBulbTemperature
    • RelativeHumidity
    • InfiltrationSensible
    • TotalSensibleLoad
    • TotalLatentLoad
    • TotalRadiantLoad
  • Pset_SpaceThermalLoadPHistory
    • PeopleHistory
    • LightingHistory
    • EquipmentSensibleHistory
    • VentilationIndoorAirHistory
    • VentilationOutdoorAirHistory
    • RecirculatedAirHistory
    • ExhaustAirHistory
    • AirExchangeRateTimeHistory
    • DryBulbTemperatureHistory
    • RelativeHumidityHistory
    • InfiltrationSensibleHistory
    • TotalSensibleLoadHistory
    • TotalLatentLoadHistory
    • TotalRadiantLoadHistory
  • Pset_SpaceThermalPHistory
    • CoolingAirFlowRate
    • HeatingAirFlowRate
    • VentilationAirFlowRateHistory
    • ExhaustAirFlowRate
    • SpaceTemperatureHistory
    • SpaceRelativeHumidity
  • Pset_SpatialZoneCommon
    • Reference
    • IsExternal
  • Pset_ThermalLoad
    • OccupancyDiversity
    • LightingDiversity
    • ApplianceDiversity
    • OutsideAirPerPerson
    • ReceptacleLoadIntensity
    • AppliancePercentLoadToRadiant
    • LightingLoadIntensity
    • LightingPercentLoadToReturnAir
    • TotalCoolingLoad
    • TotalHeatingLoad
    • InfiltrationDiversitySummer
    • InfiltrationDiversityWinter
    • LoadSafetyFactor
  • Pset_Tolerance
    • ToleranceDescription
    • ToleranceBasis
    • OverallTolerance
    • HorizontalTolerance
    • OrthogonalTolerance
    • VerticalTolerance
    • PlanarFlatness
    • HorizontalFlatness
    • ElevationalFlatness
    • SideFlatness
    • OverallOrthogonality
    • HorizontalOrthogonality
    • OrthogonalOrthogonality
    • VerticalOrthogonality
    • OverallStraightness
    • HorizontalStraightness
    • OrthogonalStraightness
    • VerticalStraightness
  • Pset_Uncertainty
    • UncertaintyBasis
    • UncertaintyDescription
    • HorizontalUncertainty
    • LinearUncertainty
    • OrthogonalUncertainty
    • VerticalUncertainty
  • Qto_BodyGeometryValidation
    • GrossSurfaceArea
    • NetSurfaceArea
    • GrossVolume
    • NetVolume
    • SurfaceGenusBeforeFeatures
    • SurfaceGenusAfterFeatures
  • Qto_SpatialZoneBaseQuantities
    • Length
    • Width
    • Height

5.4.3.70.6 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.

IfcProduct (18)
Body Geometry General

The body or solid model geometric representation of an IfcProduct is typically defined using a Tessellation or Brep. Subtypes may provide recommendations on other representation types that may be used. The following attribute values for the IfcShapeRepresentation holding this geometric representation shall be used:

Box Geometry General

No description available.

CoG Geometry General

No description available.

Mapped Geometry General

No description available.

Object Typing General

This concept can be applied to the following resources:

Product Geometric Representation General

The geometric representation of any IfcProduct is provided by the IfcProductDefinitionShape allowing multiple geometric representations. It uses the Product Placement concept utilizing IfcLocalPlacement to establish an object coordinate system, within all geometric representations are founded.

Product Geometry Colour General

No description available.

Product Geometry Layer General

No description available.

Product Local Placement General

No description available.

Product Relative Positioning General

If the IfcProduct Product Placement is placed relative to an IfcPositioningElement this relationship covers the information on which IfcPositioningElement positions the IfcProduct.

Product Span Positioning General

No description available.

Product Topology Representation General

No description available.

Property Sets for Objects General

This concept can be applied to the following resources:

Quantity Sets General

This concept can be applied to the following resources:

Reference Geometry General

No description available.

Reference SweptSolid Geometry General

No description available.

Reference SweptSolid PolyCurve Geometry General

No description available.

Reference Tessellation Geometry General

No description available.

IfcSpatialElement (11)
Body Geometry General

A spatial element will not usually provide a body geometry, instead relying on its constituting elements. A body geometry may be provided if it is necessary to expose an independent geometric representation. This geometry is typically expressed by its exterior elements or volume boundary.

FootPrint GeomSet Geometry General

No description available.

Group Spatial Connectivity General

No description available.

Object Typing General

This concept can be applied to the following resources:

Property Sets for Objects General

This concept can be applied to the following resources:

Property Sets for Performance General

This concept can be applied to the following resources:

Spatial Container General

This concept can be applied to the following resources:

Spatial Element Attributes General

No description available.

Spatial Interference General

No description available.

Spatial Interference With Zones General

No description available.

Spatial Service Connectivity General

No description available.

Click to show 45 hidden inherited concepts Click to hide 45 inherited concepts
IfcSpatialZone (4)
Object Typing General

This concept can be applied to the following resources:

Property Sets for Objects General

This concept can be applied to the following resources:

Quantity Sets General

This concept can be applied to the following resources:

Spatial Zone Attributes General

No description available.

Table 5.4.3.70.C

5.4.3.70.7 Formal representation

ENTITY IfcSpatialZone
 SUBTYPE OF (IfcSpatialElement);
	PredefinedType : OPTIONAL IfcSpatialZoneTypeEnum;
 WHERE
	CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR
 (PredefinedType <> IfcSpatialZoneTypeEnum.USERDEFINED) OR
 ((PredefinedType = IfcSpatialZoneTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
	CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR
  ('IFC4X3_DEV_64d1fa4d.IFCSPATIALZONETYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));
END_ENTITY;

5.4.3.70.8 References

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5.4.3.70.9 Changelog

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