IfcFanType

BACnet MVD

#### IfcFanType

Natural language names

| Ventilator - Typ
| Fan Type
| Type de ventilateur

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcFanType |  |  |  |
OwnerHistory |  |  | MODIFIED | Instantiation changed to OPTIONAL.
ApplicableOccurrence |  |  | MODIFIED | Type changed from IfcLabel to IfcIdentifier.

##### Semantic definitions at the entity

Entity definition

The flow moving device type IfcFanType defines commonly shared information for occurrences of fans. The set of shared information may include:

- common properties with shared property sets
- common representations
- common materials
- common composition of elements
- common ports

It is used to define a fan type specification indicating the specific product information that is common to all occurrences of that product type. The IfcFanType may be declared within IfcProject or IfcProjectLibrary using IfcRelDeclares and may be exchanged with or without occurrences of the type. Occurrences of IfcFanType are represented by instances of IfcFan. Refer to the documentation at IfcFan for supported property sets, materials, composition, and ports.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
10 | PredefinedType | IfcFanTypeEnum |  | Defines the type of fan typically used in building services. |  | 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
IfcTypeObject

5

ApplicableOccurrence

IfcIdentifier

?

The attribute optionally defines the data type of the occurrence object, to which the assigned type object can relate. If not present, no instruction is given to which occurrence object the type object is applicable. The following conventions are used:

- The IFC entity name of the applicable occurrence using the IFC naming convention, CamelCase with IFC prefix
- It can be optionally followed by the predefined type after the separator "/" (forward slash), using uppercase
- If one type object is applicable to many occurrence objects, then those occurrence object names should be separate by comma "," forming a comma separated string.

> EXAMPLE Refering to a furniture as applicable occurrence entity would be expressed as 'IfcFurnishingElement', refering to a brace as applicable entity would be expressed as 'IfcMember/BRACE', refering to a wall and wall standard case would be expressed as 'IfcWall, IfcWallStandardCase'.

X

6

HasPropertySets

IfcPropertySetDefinition

? S[1:?]

Set list of unique property sets, that are associated with the object type and are common to all object occurrences referring to this object type.

> IFC2x3 CHANGE The attribute aggregate type has been changed from LIST to SET.

X

X

| Types | IfcRelDefinesByType @RelatingType | S[0:1] | Reference to the relationship IfcRelDefinedByType and thus to those occurrence objects, which are defined by this type. |  | X
IfcTypeProduct
7 | RepresentationMaps | IfcRepresentationMap | ? L[1:?] | List of unique representation maps. Each representation map describes a block definition of the shape of the product style. By providing more than one representation map, a multi-view block definition can be given. | X | X
8 | Tag | IfcLabel | ? | The tag (or label) identifier at the particular type of a product, e.g. the article number (like the EAN). It is the identifier at the specific level. |  | X

ReferencedBy

IfcRelAssignsToProduct
@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 type.

> IFC4 CHANGE New inverse relationship.

X

IfcElementType
9 | ElementType | 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
IfcDistributionElementType
IfcDistributionFlowElementType
IfcFlowMovingDeviceType
IfcFanType
10 | PredefinedType | IfcFanTypeEnum |  | Defines the type of fan typically used in building services. |  | X

##### Definitions applying to Design Transfer View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View
IfcTypeObject
| Library Association | Library Association | Design Transfer View
IfcElementType
| Material Constituents | Material Constituent Set | Design Transfer View
| Material Single | Material Single | Design Transfer View
| Type Body CSG Geometry | Type Body CSG Geometry | Design Transfer View
| Type Body Brep Geometry | Type Body Brep Geometry | Design Transfer View
| Type Body AdvancedBrep Geometry | Type Body AdvancedBrep Geometry | Design Transfer View
| Element Type Aggregation | Type Element Aggregation | Design Transfer View
| Property Sets for Types | Property Sets for Types | Design Transfer View
IfcDistributionElementType
| Type Clearance Geometry | Type Clearance Geometry | Design Transfer View

##### Definitions applying to BACnet View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View
IfcTypeObject
| Library Association | Library Association | Design Transfer View
IfcElementType
| Material Constituents | Material Constituent Set | Design Transfer View
| Material Single | Material Single | Design Transfer View
| Type Body CSG Geometry | Type Body CSG Geometry | Design Transfer View
| Type Body Brep Geometry | Type Body Brep Geometry | Design Transfer View
| Type Body AdvancedBrep Geometry | Type Body AdvancedBrep Geometry | Design Transfer View
| Element Type Aggregation | Type Element Aggregation | Design Transfer View
| Property Sets for Types | Property Sets for Types | Design Transfer View
IfcDistributionElementType
| Type Clearance Geometry | Type Clearance Geometry | Design Transfer View

##### Formal representations

XML Specification
`<xs:element name="IfcFanType" type="ifc:IfcFanType" substitutionGroup="ifc:IfcFlowMovingDeviceType" nillable="true"/>
<xs:complexType name="IfcFanType">
<xs:complexContent>
<xs:extension base="ifc:IfcFlowMovingDeviceType">
<xs:attribute name="PredefinedType" type="ifc:IfcFanTypeEnum" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcFanType
SUBTYPE OF (IfcFlowMovingDeviceType);
PredefinedType : IfcFanTypeEnum;
WHERE
CorrectPredefinedType : (PredefinedType <> IfcFanTypeEnum.USERDEFINED) OR
((PredefinedType = IfcFanTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));
END_ENTITY;

EXPRESS-G diagram

`

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