IfcFaceOuterBound

BACnet MVD

#### IfcFaceOuterBound

Natural language names

| Äußere Flächenbegrenzung - Topologie
| Face Outer Bound
| Contour extérieur de face

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC4 Addendum 1
IfcFaceOuterBound |  |  |  |
Orientation |  |  | MODIFIED | Type changed from BOOLEAN to IfcBoolean.

##### Semantic definitions at the entity

Entity definition

> NOTE Definition according to ISO/CD 10303-42:1992
> A face outer bound is a special subtype of face bound which carries the additional semantics of defining an outer boundary on the face. No more than one boundary of a face shall be of this type.

> NOTE Entity adapted from face_outer_bound defined in ISO 10303-42.

> HISTORY New entity in IFC1.0

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcRepresentationItem

LayerAssignment

IfcPresentationLayerAssignment
@AssignedItems

S[0:1]

Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items.

> IFC2x3 CHANGE The inverse attribute LayerAssignments has been added.

> IFC4 CHANGE The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.

X

StyledByItem

IfcStyledItem
@Item

S[0:1]

Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.

> IFC2x3 CHANGE The inverse attribute StyledByItem has been added.

X

X

IfcTopologicalRepresentationItem
IfcFaceBound
1 | Bound | IfcLoop |  | The loop which will be used as a face boundary. | X | X
2 | Orientation | IfcBoolean |  | This indicated whether (TRUE) or not (FALSE) the loop has the same sense when used to bound the face as when first defined. If sense is FALSE the senses of all its component oriented edges are implicitly reversed when used in the face. | X | X
IfcFaceOuterBound

##### Formal representations

XML Specification
`<xs:element name="IfcFaceOuterBound" type="ifc:IfcFaceOuterBound" substitutionGroup="ifc:IfcFaceBound" nillable="true"/>
<xs:complexType name="IfcFaceOuterBound">
<xs:complexContent>
<xs:extension base="ifc:IfcFaceBound"/>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcFaceOuterBound
SUBTYPE OF (IfcFaceBound);
END_ENTITY;

EXPRESS-G diagram

`

Link to this page