EXPRESS Definition
EXPRESS-G Diagram
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EXPRESS Definition |
EXPRESS-G Diagram |
No Simple Types defined in this Schema
No Select Types defined in this Schema
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
No Functions defined in this Schema
The IfcSharedBldgServiceElements schema in the interoperability layer defines basic object concepts required for interoperability between Building Service domain extensions (notably HVAC) and other domain extensions defined in the current IFC model. This schema includes concepts such as Equipment, Fixture, and Electrical Appliance.
The following items have been removed or renamed in this schema for this release of the IFC model from earlier IFC model releases:
- IfcDiscreteElementTypeEnum: This enumeration was originally provided as an empty stub in R1.5 so that it could be expanded in R2.0. This enumeration has been removed in R2.0 because the IfcDistributionElement class has been subtyped and is no longer a type-driven leaf-node in the object model.
- IfcEquipment: This class has been split into two classes: IfcEquipment and IfcFlowEquipment to accommodate equipment participating in a distribution system.
- IfcFixtureTypeEnum: This enumeration was originally provided in IFC R1.0 to elaborate two generic types of fixtures: electrical and plumbing. This enumeration has been removed in R2.0 because the IfcFixture class has been divided into two classes called IfcElectricalFixture and IfcPlumbingFixture, each of which has their own enumerations defining type (IfcElectricalFixtureTypeEnum and IfcPlumbingFixtureTypeEnum).
- IfcFixture: This class has been removed in IFC R2.0 with its contents divided into two classes called IfcElectricalFixture and IfcPlumbingFixture.
EXPRESS Definition
Definition from IAI: This enumeration defines the different types of discrete elements an IfcDiscreteElement object can fulfill.
This Enumeration has changed after IFC Release 1.5.1, please see the Migration Guide for details
: New type in IFC Release 1.5.
ISSUES: No issues to date.
This enumeration defines the available PreDefined Types for IfcDiscreteElement
Insulation
Materials with low heat conductance
UserDefined
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines the different types of discrete elements an IfcDistributionFlowElement object can fulfill.
New Enumeration in IFC Release 2.0
ISSUES: No issues to date.
FluidFlow
UserDefined
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines the different types of discrete elements an IfcDistributionPort object can fulfill.
New Enumeration in IFC Release 2.0
ISSUES: No issues to date.
This enumeration defines the available PreDefined Types for IfcDistributionPortGeometry
RoundDuctPort
Properties of a round duct connection.
RectangularDuctPort
Properties of a rectangular duct connection.
OvalDuctPort
Properties of an oval duct connection.
RoundPipePort
Properties of a round pipe connection.
UserDefined
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines the different types of Electrical Appliances an IfcElectricalAppliance object can fulfill.
This Enumeration has changed after IFC Release 1.5.1, please see the Migration Guide for details
: New type in IFC Release 1.0.
ISSUES: No issues to date.
This enumeration defines the available PreDefined Types for IfcElectricalAppliance
Computer
Computer Electrical Appliance Type
Copier
Copier Electrical Appliance Type
Facsimile
Facsimile Electrical Appliance Type
Printer
Printer Electrical Appliance Type
Telephone
Telephone Electrical Appliance Type
UserDefined
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines the different types of electrical fixtures an IfcElectricalFixture object can fulfill.
New Enumeration in IFC Release 2.0
ISSUES: No issues to date.
This enumeration defines the available PreDefined Types for IfcElectricalFixture
LightFixture
PowerOutlet
RadiantHeater
UserDefined
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines the different types of Equipment an IfcEquipment object can fulfill.
This Enumeration has changed after IFC Release 1.5.1, please see the Migration Guide for details
: New type in IFC Release 1.0.
ISSUES: No issues to date.
This enumeration defines the available PreDefined Types for IfcEquipment
WindowCleaning
UserDefined
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration the flow direction at a connection point as either a Source, Sink, or both SourceAndSink.
New Enumeration in IFC Release 2.0
ISSUES: No issues to date.
Source
Sink
SourceAndSink
UserDefined
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines the different types of Equipment an IfcFlowEquipment object can fulfill.
New Enumeration in IFC Release 2.0
ISSUES: No issues to date.
This enumeration defines the available PreDefined Types for IfcFlowEquipment
AirFilter
Apparatus used to remove particulate or gaseous matter from air. This property set is typically used in conjunction with another piece of equipment, such as an AirHandler or PackagedACUnit
AirHandler
Equipment which modifies the psychrometric properties of a controlled air stream. It typically consists of an arrangement of Fans, Coils and AirFilters
Boiler
Equipment which converts stored energy to heat which is added to a fluid; typically used to heat water.
Chiller
Equipment used to implement a refrigeration cycle for cooling a fluid
Coil
Equipment used to provide heat transfer between non-mixing media. This is typically used in conjunction with an AirHandler or PackagedACUnit and uses a TubeBundle
Compressor
Equipment that compresses a fluid typically used in a refrigeration circuit
Convector
Equipment which adds heat to a space utilizing natural convection
CoolingTower
Equipment which rejects heat to ambient air.
Fan
Equipment which imparts mechanical work on a gas
HeatExchanger
Equipment used to provide heat transfer between non-mixing media such as both plate and shell and tube heat exchangers
Motor
Equipment used to convert electrical power to rotational mechanical power
PackagedACUnit
Equipment which utilizes an integral refrigeration cycle for cooling a fluid (typically air)
Pump
Equipment which imparts mechanical work on a liquid
TubeBundle
Tube and bundles of tubes properties used within equipment
UnitHeater
Equipment which adds heat to a space
Elevator
Escalator
UserDefined
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines the different types of fittings an IfcFlowFitting object can fulfill.
New Enumeration in IFC Release 2.0
ISSUES: No issues to date.
This enumeration defines the available PreDefined Types for IfcFlowFitting
DuctFitting
PipeFitting
UserDefined
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines the different types of flow segments an IfcFlowSegment object can fulfill.
New Enumeration in IFC Release 2.0
ISSUES: No issues to date.
This enumeration defines the available PreDefined Types for IfcFlowSegment
DuctSegment
PipeSegment
GutterSegment
UserDefined
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines the different types of flow terminals an IfcFlowTerminal object can fulfill.
New Enumeration in IFC Release 2.0
: New type in IFC Release 1.0.
ISSUES: No issues to date.
This enumeration defines the available PreDefined Types for IfcFlowTerminal
AirTerminal
RoofDrain
Scupper
UserDefined
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines the different types of plumbing fixtures an IfcPlumbingFixture object can fulfill.
New Enumeration in IFC Release 2.0
ISSUES: No issues to date.
This enumeration defines the available PreDefined Types for IfcPlumbingFixture
Faucet
Sink
Toilet
Urinal
Shower
UserDefined
NotDefined
EXPRESS Definition
New Enumeration in IFC Release 2.0
Entry
Exit
Elbow
Transition
Junction
Obstruction
UserDefined
NotDefined
 Fully Attributed View |
EXPRESS Definition |
Definition from IAI: This class defines elements in a building services system that do not participate as either equipment or distribution elements, such as insulation or attaching elements. This class will be more fully elaborated in future IFC versions.
This Class has changed after IFC Release 1.5.1, please see the Migration Guide for details
: New class in IFC Release 1.5.
ISSUES: No issues to date.
IfcRoot
IfcObject
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
PredefinedType
Predefined generic types are specified in an Enumeration. A TypeDefinition is available for each generic type (as the required attributes differ). Use Type Definition corresponding to this generic type.
INV
Attaches
Inverse relationship to a related distribution element to which this discrete element is attached.
WR61
((PredefinedType = IfcDiscreteElementTypeEnum.UserDefined) AND EXISTS(SELF\IfcObject.UserDefinedType)) OR ((PredefinedType <> IfcDiscreteElementTypeEnum.UserDefined) AND NOT(EXISTS(SELF\IfcObject.UserDefinedType)))
Type driven PropertySets
PreDefined Type
Associated PropertySet
Insulation
UserDefined
NotDefined
Object Geometry in Context
The geometric representation of IfcDiscreteElement is given by the IfcProductShape, allowing multiple geometric representations. Included are:
Local Position
The local placement for IfcDiscreteElement is defined in its supertype, IfcProduct. It is defined by the
- IfcLocalPlacement, which defines the local coordinate system that is referenced by all geometric representations.
Standard Geometric Representation
The standard geometric representation of IfcDiscreteElement is defined using explicit geometry. The faceted B-Rep capabilities (with or without voids) shall be supported for standard representation.
Currently, the usage of attribute driven geometry for IfcDiscreteElement is not supported.
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Fully Attributed View |
EXPRESS Definition |
Definition from IAI: This class defines elements of a distribution system that are used to impart control over other elements of the distribution system.
New Class in IFC Release 2.0
ISSUES: No issues to date.
IfcRoot
IfcActuator
IfcSensor
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
ControlElementID
STRING
The ControlElement Point Identification assigned to this control element by the Building Automation System.
INV
FlowElement
SET [0:1] OF IfcDistributionFlowElement
Inverse relationship to a distribution flow element
Object Geometry in Context
The geometric representation of IfcDistributionControlElement is given by the IfcProductShape, allowing multiple geometric representations. Included are:
Local Position
The local placement for IfcDistributionControlElement is defined in its supertype, IfcProduct. It is defined by the
- IfcLocalPlacement, which defines the local coordinate system that is referenced by all geometric representations.
Standard Geometric Representation
The standard geometric representation of IfcDistributionControlElement is defined using explicit geometry. The faceted B-Rep capabilities (with or without voids) shall be supported for standard representation.
Currently, the usage of attribute driven geometry for IfcDistributionControlElement is not supported.
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Fully Attributed View |
EXPRESS Definition |
Definition from IAI: This class defines elements that participate in a distribution system.
This Class has changed after IFC Release 1.5.1, please see the Migration Guide for details
: New class in IFC Release 1.5.
ISSUES: No issues to date.
IfcRoot
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
INV
AttachedBy
SET [0:?] OF IfcRelAttachesElements
Inverse relationship to a related discrete element which might be attached to this distribution element.
Object Geometry in Context
The geometric representation of IfcDistributionElement is given by the IfcProductShape, allowing multiple geometric representations. Included are:
Local Position
The local placement for IfcDistributionElement is defined in its supertype, IfcProduct. It is defined by the
- IfcLocalPlacement, which defines the local coordinate system that is referenced by all geometric representations.
Standard Geometric Representation
The standard geometric representation of IfcDistributionElement is defined using explicit geometry. The faceted B-Rep capabilities (with or without voids) shall be supported for standard representation.
Currently, the usage of attribute driven geometry for IfcDistributionElement is not supported.
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Fully Attributed View |
EXPRESS Definition |
Definition from IAI: This class defines elements of a distribution system that facilitate the distribution of energy or matter, such as air, water or power.
New Class in IFC Release 2.0
ISSUES: No issues to date.
IfcRoot
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
FlowElementType
Predefined generic types are specified in an Enumeration. A TypeDefinition is available for each generic type (as the required attributes differ). Use Type Definition corresponding to this generic type.
ControlElements
SET [0:?] OF IfcDistributionControlElement
References control elements which may be used to impart control on the Distribution Element.
INV
ToRelatingPort
SET [0:?] OF IfcRelConnectsPorts
Inverse relationship to the port that is being connected to.
INV
ToRelatedPort
SET [0:?] OF IfcRelConnectsPorts
Inverse relationship to the port that is being connected from.
Object Geometry in Context
The geometric representation of IfcDistributionFlowElement is given by the IfcProductShape, allowing multiple geometric representations. Included are:
Local Position
The local placement for IfcDistributionFlowElement is defined in its supertype, IfcProduct. It is defined by the
- IfcLocalPlacement, which defines the local coordinate system that is referenced by all geometric representations.
Standard Geometric Representation
The standard geometric representation of IfcDistributionFlowElement is defined using explicit geometry. The faceted B-Rep capabilities (with or without voids) shall be supported for standard representation.
Currently, the usage of attribute driven geometry for IfcDistributionFlowElement is not supported.
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Fully Attributed View |
EXPRESS Definition |
Definition from IAI: This class defines the geometric location and configuration of a port on a distribution element. This information can be used to determine how to physically connect distribution elements.
New Class in IFC Release 2.0
ISSUES: No issues to date.
IfcRoot
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
PredefinedType
Predefined generic types are specified in an Enumeration. A TypeDefinition is available for each generic type (as the required attributes differ). Use Type Definition corresponding to this generic type.
PortLocation
Local placement of the port relative to its distribution element's local placement
PortShape
Profile that defines the port connection geometry
WR71
((PredefinedType = IfcDistributionPortTypeEnum.UserDefined) AND EXISTS(SELF\IfcObject.UserDefinedType)) OR ((PredefinedType <> IfcDistributionPortTypeEnum.UserDefined) AND NOT(EXISTS(SELF\IfcObject.UserDefinedType)))
Type driven PropertySets
PreDefined Type
Associated PropertySet
RoundDuctPort
RectangularDuctPort
OvalDuctPort
RoundPipePort
UserDefined
NotDefined
This class has no geometric representation.
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Fully Attributed View |
EXPRESS Definition |
Definition from IAI: This class defines common electrical appliances found in a typical AEC/FM project. Electrical Appliances generally consist of electrical devices which are not a fixed part of the building but instead can be moved from one space to another and powered with electricity.
This Class has changed after IFC Release 1.5.1, please see the Migration Guide for details
: New class in IFC Release 1.0.
ISSUES: No issues to date.
IfcRoot
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
PredefinedType
Predefined generic types are specified in an Enumeration. A TypeDefinition is available for each generic type (as the required attributes differ). Use Type Definition corresponding to this generic type.
WR61
((PredefinedType = IfcElectricalApplianceTypeEnum.UserDefined) AND EXISTS(SELF\IfcObject.UserDefinedType)) OR ((PredefinedType <> IfcElectricalApplianceTypeEnum.UserDefined) AND NOT(EXISTS(SELF\IfcObject.UserDefinedType)))
Common PropertySet
Type driven PropertySets
The geometric representation of IfcElectricalAppliance is given by the IfcProductShape, allowing multiple geometric representations. Included are:
Local Position
The local for IfcElectricalAppliance is defined in its supertype, IfcProduct. It is defined by the
- IfcLocalPlacement, which defines the local coordinate system that is referenced by all geometric representations.
Standard Geometric Representation
The standard geometric representation of IfcElectricalAppliance is defined using explicit geometry. The faceted B-Rep capabilities (with or without voids) shall be supported for standard representation.
Currently, the usage of attribute driven geometry for IfcElectricalAppliance is not supported.
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Fully Attributed View |
EXPRESS Definition |
Definition from IAI: Permanently attached appendage, appliance, or device that requires electrical power and is connected to a building electrical system (e.g. lighting fixtures).
New Class in IFC Release 2.0
ISSUES: No issues to date.
IfcRoot
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
PredefinedType
Predefined generic types are specified in an Enumeration. A TypeDefinition is available for each generic type (as the required attributes differ). Use Type Definition corresponding to this generic type.
WR81
((PredefinedType = IfcElectricalFixtureTypeEnum.UserDefined) AND EXISTS(SELF\IfcObject.UserDefinedType)) OR ((PredefinedType <> IfcElectricalFixtureTypeEnum.UserDefined) AND NOT(EXISTS(SELF\IfcObject.UserDefinedType)))
Common PropertySet
Type driven PropertySets
PreDefined Type
Associated PropertySet
LightFixture
Pset_LightFixture
PowerOutlet
Pset_PowerOutlet
RadiantHeater
Pset_RadiantHeater
UserDefined
NotDefined
Object Geometry in Context
The geometric representation of IfcElectricalFixture is given by the IfcProductShape, allowing multiple geometric representations. Included are:
Local Position
The local placement for IfcElectricalFixture is defined in its supertype, IfcProduct. It is defined by the
- IfcLocalPlacement, which defines the local coordinate system that is referenced by all geometric representations.
Standard Geometric Representation
The standard geometric representation of IfcElectricalFixture is defined using explicit geometry. The faceted B-Rep capabilities (with or without voids) shall be supported for standard representation.
Currently, the usage of attribute driven geometry for IfcElectricalFixture is not supported.
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Fully Attributed View |
EXPRESS Definition |
Definition from IAI: Equipment is an apparatus used to perform conveyance, work, energy conversion or heat transfer. This class is used to capture the characteristics of equipment that does not participate in a distribution system.
This Class has changed after IFC Release 1.5.1, please see the Migration Guide for details
: New class in IFC Release 1.0.
ISSUES: No issues to date.
IfcRoot
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
PredefinedType
Predefined generic types are specified in an Enumeration. A TypeDefinition is available for each generic type (as the required attributes differ). Use Type Definition corresponding to this generic type.
WR61
((PredefinedType = IfcEquipmentTypeEnum.UserDefined) AND EXISTS(SELF\IfcObject.UserDefinedType)) OR ((PredefinedType <> IfcEquipmentTypeEnum.UserDefined) AND NOT(EXISTS(SELF\IfcObject.UserDefinedType)))
Common PropertySet
Type driven PropertySets
PreDefined Type
Associated PropertySet
WindowCleaning
Pset_WindowCleaning
UserDefined
NotDefined
Object Geometry in Context
The geometric representation of IfcEquipment is given by the IfcProductShape, allowing multiple geometric representations. Included are:
Local Position
The local position for IfcEquipment is defined in its supertype, IfcProduct. It is defined by the
- IfcLocalPlacement, which defines the local coordinate system that is referenced by all geometric representations.
Standard Geometric Representation
The standard geometric representation of IfcEquipment is defined using explicit geometry. The faceted B-Rep capabilities (with or without voids) shall be supported for standard representation.
Currently, the usage of attribute driven geometry for IfcEquipment is not supported.
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Fully Attributed View |
EXPRESS Definition |
Definition from IAI: This class defines elements of a distribution system that affect flow through a distribution system.
New Class in IFC Release 2.0
ISSUES: No issues to date.
IfcRoot
No attributes defined on this level.
Object Geometry in Context
The geometric representation of IfcFlowController is given by the IfcProductShape, allowing multiple geometric representations. Included are:
Local Position
The local placement for IfcFlowController is defined in its supertype, IfcProduct. It is defined by the
- IfcLocalPlacement, which defines the local coordinate system that is referenced by all geometric representations.
Standard Geometric Representation
The standard geometric representation of IfcFlowController is defined using explicit geometry. The faceted B-Rep capabilities (with or without voids) shall be supported for standard representation.
Currently, the usage of attribute driven geometry for IfcFlowController is not supported.
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Fully Attributed View |
EXPRESS Definition |
Definition from IAI: FlowEquipment is an apparatus used to perform conveyance, work, energy conversion or heat transfer. This class is used to capture the characteristics of equipment that is participating in a distribution system.
New Class in IFC Release 2.0
ISSUES: No issues to date.
IfcRoot
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
PredefinedType
Predefined generic types are specified in an Enumeration. A TypeDefinition is available for each generic type (as the required attributes differ). Use Type Definition corresponding to this generic type.
WR81
((PredefinedType = IfcFlowEquipmentTypeEnum.UserDefined) AND EXISTS(SELF\
