#### 8.7.3.4 IfcBoundedSurface

| Surface englobée
| Begrenzte Oberfläche

An IfcBoundedSurface is a surface of finite area.

> NOTE Definition according to ISO/CD 10303-42:1992
> A bounded surface is a surface of finite area with identifiable boundaries.

> NOTE Entity adapted from bounded_surface defined in ISO10303-42.

> HISTORY New entity in IFC2x

> IFC4 CHANGE Entity made abstract.

Informal Propositions:

1. A bounded surface has finite non-zero surface area.
2. A bounded surface has boundary curves.

XSD Specification:

<xs:element name="IfcBoundedSurface" type="ifc:IfcBoundedSurface" abstract="true" substitutionGroup="ifc:IfcSurface" nillable="true"/>
<xs:complexType name="IfcBoundedSurface" abstract="true">
<xs:complexContent>
<xs:extension base="ifc:IfcSurface"/>
</xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcBoundedSurface

| SUBTYPE OF (IfcSurface);

END_ENTITY;

Inheritance Graph:

ENTITY IfcBoundedSurface

| ENTITY IfcRepresentationItem

| INVERSE

LayerAssignment | : | SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems;
StyledByItem | : | SET [0:1] OF IfcStyledItem FOR Item;

| ENTITY IfcGeometricRepresentationItem

| ENTITY IfcSurface

| DERIVE

Dim | : | IfcDimensionCount := 3;

| ENTITY IfcBoundedSurface

END_ENTITY;

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