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
L IfcLossOrGainEnum O IfcOccupantTypeEnum R IfcRequirementOrCriteriaEnum
IfcResidentEnumU IfcUseCaseSourceEnum V IfcVisitorEnum
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
F IfcFireCompartment O IfcOccupancyNumber
IfcOccupantR IfcRelOccupiesSpaces S IfcSpaceUseCase
No Functions defined in this Schema
The Schema IfcSharedSpatialElements is defined at the Interoperability Layer and covers the definition of spatial elements that are shared among several IFC domain or application type models. It enhances the definition of space as specified at the IfcProductExtension schema.
EXPRESS Definition
Definition from IAI: This enumeration defines the thermal use cases as either being a loss or a gain to the space.
New Enumeration in IFC Release 2.0
Loss
Gain
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines the available Generic Types for IfcOccupant.
New Enumeration in IFC Release 2.0
This enumeration defines the available PreDefined Types for IfcOccupant
Owner
Lessee
Tenant
Assignee
UserDefined
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines whether the thermal use case is a requirement for a particular thermal space quality or a criteria.
New Enumeration in IFC Release 2.0
Requirement
Criteria
NotDefined
EXPRESS Definition
Definition from IAI: This enumeration defines the different categories under which visitors of a space or building can be classified.
New Enumeration in IFC Release 2.0
Intermittent
Regular
Permanent
NotDefined
EXPRESS Definition
Definition from IFC: This enumeration defines the various sources of thermal loads or gains for spaces, derived from various use cases.
New Enumeration in IFC Release 2.0
Person
Lighting
Machine
VentilationInnerAir
VentilationOuterAir
ExhaustAir
AirExchangeRate
DryBulbTemperature
RelativeHumidity
EXPRESS Definition
New Enumeration in IFC Release 2.0
Intermittent
Regular
NotDefined
 Fully Attributed View |
EXPRESS Definition |
Definition from IAI: The Fire Compartment class (IfcFireCompartment) is considered as a specialization of Space (IfcSpace) for fire compartmentation purposes. It is an aggregate of spaces under this view, using the IfcRelAssemblesSpaces objectified relationship. It defines the geometric information about the fire compartment, the fire use classification, fire risk factors and information, whether this compartment is ventilated or sprinkler protected.
New Class in IFC Release 2.0
IfcRoot
IfcObject
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
OPT
calcHeightAboveGrade
Height of floor of top storey of Fire Compartment above accessible horizontal surface external to the Fire Compartment.
OPT
MainFireUse
Main fire use for the space which is assigned from the Fire Use Classification.
OPT
AncillaryFireUse
Ancillary fire use for the space which is assigned from the Fire Use Classification.
OPT
FireRiskFactor
INTEGER
Fire Risk factor assigned to the space
HasNaturalVentilation
LOGICAL
Indication whether the space is ventilated natural (true) or mechanical (false).
HasSprinklerProtection
LOGICAL
Indication whether the space is sprinkler protected (true) or not (false).
WR61
The fire compartment class can only exists as an assembly of spaces
HIINDEX(SELF\IfcSpace.IsAssemblyThrough)=1
WR62
The fire compartment shall not assemble other fire compartments
SIZEOF(QUERY(temp <* SELF\IfcSpace.IsAssemblyThrough[1].RelatedSpaces | 'IFCSHAREDSPATIALELEMENTS.IFCFIRECOMPARTMENT' IN TYPEOF(temp))) = 0
The geometric use cases for IfcFireCompartment are defined at its supertype IfcSpace.
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Fully Attributed View |
EXPRESS Definition |
Definition from IAI: The Occupancy Number Class (IfcOccupancyNumber) contains all information about the actual and planned, internal and cumulative occupancy numbers and occupancy rate. In addition more detailed information about the physical ability, the type of occupiers (residents or visitors), and the type of occupancy (intermittent, regular, permanent) are captured.
New Class in IFC Release 2.0
IfcRoot
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
OPT
ActualOccupancyNumber
INTEGER
The actual number of persons housed in a space, zone or building at a given time, usually in an existing accommodation.
OPT
DesignIntentOccupancyNumber
INTEGER
The number of persons housed in a space, zone or building as specified in the Design Brief.
OPT
ActualCumulativeOccupancyNumber
INTEGER
The actual number of occupants in a space, zone, or building, plus that arriving from adjacent evacuated spaces.
OPT
DesignIntentCumulativeOccupancyNumber
INTEGER
The design intent number of occupants in a space, zone, or building, plus that arriving from adjacent evacuated spaces.
OPT
OccupancyRate
Occupancy per Area Measure as specified for a specific function of the space, usually given by a recognized standard. The usually used unit is Person/m².
OPT
ActualNumberOfResidents
INTEGER
The actual number of residents housed in a space.
OPT
DesignIntentNumberOfResidents
INTEGER
The number of residents housed in a space as specified in the Design Brief.
OPT
ResidentsOccupancyType
Resident, those who either live or work in the space under consideration, occupy the space.
OPT
ActualNumberOfVisitors
INTEGER
The actual number of visitors occupying a space in a given time.
OPT
DesignIntentNumberOfVisitors
INTEGER
The number of visitors occupying a space in a given time as specified in the Design Brief.
OPT
VisitorsOccupancyType
Visitors - coming into the space for the purpose of visiting, viewing; but do not come to carryout any duties, normally performed, within the space by the residents; or for the residents.
OPT
ActualPercentageRequiringAssistance
Actual percentage of all occupance, that require assistence in case of fire escaping, e.g. disabled people or youngsters.
OPT
DesignIntentPercentageRequiringAssistance
Design intent percentage of all occupance, that require assistence in case of fire escaping, e.g. disabled people or youngsters.
Instances of this class have no physical presence and therefore no geometric representation.
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Fully Attributed View |
EXPRESS Definition |
Definition from IAI: The Occupant Class (IfcOccupant) contains all information about the occupancy owner, tenant, or lessee for the referenced space, zone, or building. An occupant is an actor within the project, characterized by its ownership relation to spaces.
The sum of all IfcOccupant instances assigned to a space, zone or building, combines all information about the occupancy aspect for spaces, zones, or buildings. In particular:
- ownership, who owns the space, zone, building, land?
- rental, who rents (tenant) the space, zone, building from whom (landlord)
- leasing, who leases (lessee) the space, zone, building, land from whom (lessor)
- rental details: duration of tenancy, rent frequency period
- leasing details: lease period, lease dates
- assignee: to whom is the space assigned?
New Class in IFC Release 2.0
IfcRoot
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
PredefinedType
Predefined types are specified in an enumeration. A Property Type Definition is available for each predefined type .
WR41
The user defined type has only to be given, if the value of the predefined type is UserDefined
((PredefinedType = IfcOccupantTypeEnum.UserDefined) AND EXISTS(SELF\IfcObject.UserDefinedType)) OR ((PredefinedType <> IfcOccupantTypeEnum.UserDefined) AND NOT(EXISTS(SELF\IfcObject.UserDefinedType)))
WR42
The occupant shall play an occupancy role as expressed by the IfcRelOccupiesSpaces relationship.
SIZEOF(QUERY(temp <* SELF\IfcActor.IsActingUpon | NOT('IFCSHAREDSPATIALELEMENTS.IFCRELOCCUPIESSPACES' IN TYPEOF(temp))))=0
Type driven PropertySets
PreDefined Type
Associated PropertySet
Owner
Lessee
Tenant
Assignee
NotDefined
UserDefined
Instances of this class have no physical presence and therefore no geometric representation.
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Fully Attributed View |
EXPRESS Definition |
Definition from IAI: The relationship object IfcRelOccupiesSpaces further constrains the parent relationship IfcRelActsUpon to a relationship between occupants (IfcOccupant) and either a space (IfcSpace), a collection of spaces (IfcZone), a building story (IfcBuildingStorey), or a building (IfcBuilding).
New Class in IFC Release 2.0
IfcRoot
No attributes defined on this level.
WR41
The actor in the occupancy relationship shall by of type IfcOccupant
'IFCSHAREDSPATIALELEMENTS.IFCOCCUPANT' IN TYPEOF(SELF\IfcRelActsUpon.RelatingActor)
WR42
The objects in the occupancy relationship shall be of type IfcSpace
SIZEOF(QUERY(temp <* SELF\IfcRelActsUpon.RelatedObjects | NOT(('IFCPRODUCTEXTENSION.IFCSPACE' IN TYPEOF(temp)) OR ('IFCPRODUCTEXTENSION.IFCBUILDING' IN TYPEOF(temp)) OR ('IFCPRODUCTEXTENSION.IFCBUILDINGSTOREY' IN TYPEOF(temp)) OR ('IFCPRODUCTEXTENSION.IFCZONE' IN TYPEOF(temp)))))=0
IP31
The relationship shall be defined acyclic.
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Fully Attributed View |
EXPRESS Definition |
Definition from IFC: The space use case defines all thermal losses and gains occurring within a space or zone. Those losses or gains can either be requirements (desired values) or criteria (actual values). The source attribute defines the source of loss or gain, and the maximum value and applicable value ratio are interpreted according to the source (see definition of IfcUseCaseSourceEnum).
New Class in IFC Release 2.0
IfcRoot
Attribute type (OPT, DER, INV)
Redefinition (SELF)
Attribute / Relation
Data or Rel. type
Definition
LossOrGain
Indicated whether the source causes a loss (TRUE) or gain (FALSE) for the space.
RequirementOrCriteria
Indicated whether the source values describe a desired value as requirement (TRUE) or an actual value as criteria (FALSE) for the space.
Source
Source of the use or load characteristic, depending on the source, the maximum value has to be interpreted
OPT
SourceDescription
STRING
Further specification for the source, which might be specific for a region or project. E.g. whether the heat gain from Person is caused by specific activities.
MaximumValue
Maximum value of the Gain or Loss for the use requirement or criteria, interpretation and unit depends on the source type
OPT
ApplicableValueRatio
Percentage of use requirement or criteria applicable to the space, interpretation depends on the source type
ConstantLoad
BOOLEAN
Indication, whether the use requirement or load is constant during the hours of a day (TRUE) or not (FALSE). If not, a Pset_H24Schedule has to be referenced by ExtendedProperties
Instances of this class have no physical presence and therefore no geometric representation.
