IfcStackTerminal

Natural language names
Rohrabdeckung
Stack Terminal
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4
    IfcStackTerminalADDED
IFC4 Addendum 1
    IfcStackTerminal
      HasCoveringsADDED
IFC4x2 DRAFT 1
    IfcStackTerminal
      PositionedRelativeToADDED
Semantic definitions at the entity
Entity definition

A stack terminal is placed at the top of a ventilating stack (such as to prevent ingress by birds or rainwater) or rainwater pipe (to act as a collector or hopper for discharge from guttering).

HISTORY  New entity in IFC4
Attribute definitions
#AttributeTypeCardinalityDescription G
9PredefinedTypeIfcStackTerminalTypeEnum? X
Formal Propositions
RuleDescription
CorrectPredefinedType
CorrectTypeAssignedEither there is no stack terminal type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcStackTerminalType.
Inherited definitions from supertypes
Entity inheritance IfcFlowTerminal IfcDistributionFlowElement IfcDistributionElement IfcElement IfcProduct IfcObject IfcObjectDefinition IfcRoot
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcRoot
1GlobalIdIfcGloballyUniqueId Assignment of a globally unique identifier within the entire software world. X
2OwnerHistoryIfcOwnerHistory? 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
3NameIfcLabel? 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
4DescriptionIfcText? Optional description, provided for exchanging informative comments.X
IfcObjectDefinition
HasAssignmentsIfcRelAssigns
@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
NestsIfcRelNests
@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
IsNestedByIfcRelNests
@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
HasContextIfcRelDeclares
@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
IsDecomposedByIfcRelAggregates
@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
DecomposesIfcRelAggregates
@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
HasAssociationsIfcRelAssociates
@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
5ObjectTypeIfcLabel? 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
IsDeclaredByIfcRelDefinesByObject
@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
DeclaresIfcRelDefinesByObject
@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
IsTypedByIfcRelDefinesByType
@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
IsDefinedByIfcRelDefinesByProperties
@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
IfcProduct
6ObjectPlacementIfcObjectPlacement? 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 constraint (e.g. relative to grid axes). It is determined by the various subtypes of IfcObjectPlacement, which includes the axis placement information to determine the transformation for the object coordinate system.X
7RepresentationIfcProductRepresentation? 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.X
ReferencedByIfcRelAssignsToProduct
@RelatingProduct
S[0:?]Reference to the IfcRelAssignsToProduct relationship, by which other products, processes, controls, resources or actors (as subtypes of IfcObjectDefinition) can be related to this product.X
PositionedRelativeToIfcRelPositions
@RelatedProducts
S[0:1]X
IfcElement
8TagIfcIdentifier? The tag (or label) identifier at the particular instance of a product, e.g. the serial number, or the position number. It is the identifier at the occurrence level.X
FillsVoidsIfcRelFillsElement
@RelatedBuildingElement
S[0:1]Reference to the IfcRelFillsElement Relationship that puts the element as a filling into the opening created within another element. X
ConnectedToIfcRelConnectsElements
@RelatingElement
S[0:?]Reference to the element connection relationship. The relationship then refers to the other element to which this element is connected to. X
IsInterferedByElementsIfcRelInterferesElements
@RelatedElement
S[0:?]Reference to the interference relationship to indicate the element that is interfered. The relationship, if provided, indicates that this element has an interference with one or many other elements.
NOTE  There is no indication of precedence between IsInterferedByElements and InterferesElements.
IFC4 CHANGE New inverse relationship.
X
InterferesElementsIfcRelInterferesElements
@RelatingElement
S[0:?]Reference to the interference relationship to indicate the element that interferes. The relationship, if provided, indicates that this element has an interference with one or many other elements.
NOTE  There is no indication of precedence between IsInterferedByElements and InterferesElements.
IFC4 CHANGE New inverse relationship.
X
HasProjectionsIfcRelProjectsElement
@RelatingElement
S[0:?]Projection relationship that adds a feature (using a Boolean union) to the IfcBuildingElement.X
ReferencedInStructuresIfcRelReferencedInSpatialStructure
@RelatedElements
S[0:?]Reference relationship to the spatial structure element, to which the element is additionally associated. This relationship may not be hierarchical, an element may be referenced by zero, one or many spatial structure elements.
IFC2x3 CHANGE  The inverse attribute has been added with upward compatibility for file based exchange.
X
HasOpeningsIfcRelVoidsElement
@RelatingBuildingElement
S[0:?]Reference to the IfcRelVoidsElement relationship that creates an opening in an element. An element can incorporate zero-to-many openings. For each opening, that voids the element, a new relationship IfcRelVoidsElement is generated. X
IsConnectionRealizationIfcRelConnectsWithRealizingElements
@RealizingElements
S[0:?]Reference to the connection relationship with realizing element. The relationship, if provided, assigns this element as the realizing element to the connection, which provides the physical manifestation of the connection relationship. X
ProvidesBoundariesIfcRelSpaceBoundary
@RelatedBuildingElement
S[0:?]Reference to space boundaries by virtue of the objectified relationship IfcRelSpaceBoundary. It defines the concept of an element bounding spaces. X
ConnectedFromIfcRelConnectsElements
@RelatedElement
S[0:?]Reference to the element connection relationship. The relationship then refers to the other element that is connected to this element. X
ContainedInStructureIfcRelContainedInSpatialStructure
@RelatedElements
S[0:1]Containment relationship to the spatial structure element, to which the element is primarily associated. This containment relationship has to be hierachical, i.e. an element may only be assigned directly to zero or one spatial structure. X
HasCoveringsIfcRelCoversBldgElements
@RelatingBuildingElement
S[0:?]Reference to IfcCovering by virtue of the objectified relationship IfcRelCoversBldgElement. It defines the concept of an element having coverings associated.X
IfcDistributionElement
HasPortsIfcRelConnectsPortToElement
@RelatedElement
S[0:?]Reference to the element to port connection relationship. The relationship then refers to the port which is contained in this element.
IFC4 CHANGE  The inverse attribute is deprecated. Relationship to ports, contained within the IfcDistributionElement is now realized by the inverse relationship NestedBy referencing IfcRelNests.
X
IfcDistributionFlowElement
HasControlElementsIfcRelFlowControlElements
@RelatingFlowElement
S[0:1]Reference to the relationship object that relates control elements.X
IfcFlowTerminal
IfcStackTerminal
9PredefinedTypeIfcStackTerminalTypeEnum? X
Definitions applying to General Usage

 Instance diagram


Concept usage

Object Typing

The Object Typing concept template applies to this entity as shown in Table 627.

HasTypeRelatingType
IfcStackTerminalType

Table 627 — IfcStackTerminal Object Typing



Property Sets for Objects

The Property Sets for Objects concept template applies to this entity as shown in Table 628.

PsetNameProperties
Pset_StackTerminalTypeCommon
TemplatePropertyNameValueReference
Single ValueReferenceIfcIdentifier
Enumerated ValueStatusIfcLabel

Table 628 — IfcStackTerminal Property Sets for Objects



Quantity Sets

The Quantity Sets concept template applies to this entity as shown in Table 629.

QsetNameQuantities
Qto_StackTerminalBaseQuantities

Table 629 — IfcStackTerminal Quantity Sets



Material

The Material Constituent Set concept template applies to this entity as shown in Table 630.

Description
Material from which the casing is constructed.

Table 630 — IfcStackTerminal Material Constituent Set



Port

The Port Nesting concept template applies to this entity as shown in Table 631.

PredefinedTypePortNameFlowSystemTypeDescription
BIRDCAGEExhaustSINKEXHAUSTExhaust inlet.
COWLExhaustSINKEXHAUSTExhaust inlet.
RAINWATERHOPPERRainSINKRAINWATERRainwater outlet.

Table 631 — IfcStackTerminal Port Nesting



mvdXML Specification
<?xml version="1.0"?>
<ConceptRoot xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" uuid="f1170c33-e4d0-43a7-b9a3-0c2e120b4e36" name="IfcStackTerminal" status="sample" applicableRootEntity="IfcStackTerminal">
  <Applicability uuid="00000000-0000-0000-0000-000000000000" status="sample">
    <Template ref="ad867ee7-6206-488f-b82e-76202e23f136" />
    <TemplateRules operator="and" />
  </Applicability>
  <Concepts>
    <Concept uuid="c5e2c798-4a70-40de-9f1e-ea8af972fa32" name="Object Typing" status="sample" override="false">
      <Template ref="35a2e10e-20df-40f4-ab2f-dacf0a6744f4" />
      <TemplateRules operator="and">
        <TemplateRule Parameters="RelatingType[Type]='IfcStackTerminalType'" />
      </TemplateRules>
    </Concept>
    <Concept uuid="7fd42e72-2be1-4c05-a39c-fe2e3ce214cd" name="Property Sets for Objects" status="sample" override="false">
      <Template ref="f74255a6-0c0e-4f31-84ad-24981db62461" />
      <TemplateRules operator="and">
        <TemplateRule Parameters="PsetName[Value]='Pset_StackTerminalTypeCommon'" />
      </TemplateRules>
    </Concept>
    <Concept uuid="cbd10b91-7a5c-4436-9de7-a6f5a7dee6e5" name="Quantity Sets" status="sample" override="false">
      <Template ref="6652398e-6579-4460-8cb4-26295acfacc7" />
      <TemplateRules operator="and">
        <TemplateRule Parameters="QsetName[Value]='Qto_StackTerminalBaseQuantities'" />
      </TemplateRules>
    </Concept>
    <Concept uuid="3d4b4380-8db9-4878-8cb5-ea6873fd55a5" name="Material" status="sample" override="false">
      <Template ref="d96f7f7d-e742-4db8-9b5d-18a36a6df884" />
      <TemplateRules operator="and">
        <TemplateRule Description="Material from which the casing is constructed." Parameters="" />
      </TemplateRules>
    </Concept>
    <Concept uuid="68324e6e-e310-4ce2-89ec-d185ce9c7019" name="Port" status="sample" override="false">
      <Template ref="bafc93b7-d0e2-42d8-84cf-5da20ee1480a" />
      <TemplateRules operator="and">
        <TemplateRule Description="Exhaust inlet." Parameters="PredefinedType[Value]='BIRDCAGE' AND PortName[Value]='Exhaust' AND SystemType[Value]='EXHAUST' AND Flow[Value]='SINK'" />
        <TemplateRule Description="Exhaust inlet." Parameters="PredefinedType[Value]='COWL' AND PortName[Value]='Exhaust' AND SystemType[Value]='EXHAUST' AND Flow[Value]='SINK'" />
        <TemplateRule Description="Rainwater outlet." Parameters="PredefinedType[Value]='RAINWATERHOPPER' AND PortName[Value]='Rain' AND SystemType[Value]='RAINWATER' AND Flow[Value]='SINK'" />
      </TemplateRules>
    </Concept>
  </Concepts>
</ConceptRoot>
Concept inheritance

#ConceptTemplateModel View
IfcRoot
IdentitySoftware IdentityGeneral Usage
Revision ControlRevision ControlGeneral Usage
IfcObjectDefinition
Classification AssociationClassification AssociationGeneral Usage
IfcObject
Object User IdentityObject User IdentityGeneral Usage
Object Predefined TypeObject Predefined TypeGeneral Usage
Property Sets with OverrideProperty Sets with OverrideGeneral Usage
IfcProduct
Product PlacementProduct PlacementGeneral Usage
Product Geometric RepresentationProduct Geometric RepresentationGeneral Usage
IfcElement
Product Local PlacementProduct Local PlacementGeneral Usage
CoG GeometryCoG GeometryGeneral Usage
Box GeometryBox GeometryGeneral Usage
FootPrint GeometryFootPrint GeometryGeneral Usage
Body SurfaceOrSolidModel GeometryBody SurfaceOrSolidModel GeometryGeneral Usage
Body SurfaceModel GeometryBody SurfaceModel GeometryGeneral Usage
Body Tessellation GeometryBody Tessellation GeometryGeneral Usage
Body Brep GeometryBody Brep GeometryGeneral Usage
Body AdvancedBrep GeometryBody AdvancedBrep GeometryGeneral Usage
Body CSG GeometryBody CSG GeometryGeneral Usage
Mapped GeometryMapped GeometryGeneral Usage
Element VoidingElement VoidingGeneral Usage
Element ProjectingElement ProjectingGeneral Usage
Linear PlacementProduct Linear PlacementGeneral Usage
IfcDistributionElement
Spatial ContainmentSpatial ContainmentGeneral Usage
IfcDistributionFlowElement
Axis GeometryAxis GeometryGeneral Usage
Clearance GeometryClearance GeometryGeneral Usage
IfcStackTerminal
Object TypingObject TypingGeneral Usage
Property Sets for ObjectsProperty Sets for ObjectsGeneral Usage
Quantity SetsQuantity SetsGeneral Usage
MaterialMaterial Constituent SetGeneral Usage
PortPort NestingGeneral Usage
Formal representations
XML Specification
 <xs:element name="IfcStackTerminal" type="ifc:IfcStackTerminal" substitutionGroup="ifc:IfcFlowTerminal" nillable="true"/>
 <xs:complexType name="IfcStackTerminal">
  <xs:complexContent>
   <xs:extension base="ifc:IfcFlowTerminal">
    <xs:attribute name="PredefinedType" type="ifc:IfcStackTerminalTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcStackTerminal
 SUBTYPE OF (IfcFlowTerminal);
  PredefinedType : OPTIONAL IfcStackTerminalTypeEnum;
 WHERE
  CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR
(PredefinedType <> IfcStackTerminalTypeEnum.USERDEFINED) OR
((PredefinedType = IfcStackTerminalTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
  CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR
('IFCPLUMBINGFIREPROTECTIONDOMAIN.IfcStackTerminalType' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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