IfcBoundedSurface

ifc边界曲面是有限面积的曲面。
注：定义根据ISO/CD 10303-42:1992
有界曲面是具有可识别边界的有限区域曲面。
注：实体改编自ISO10303-42中定义的有界曲面。
IFC2x中增加的新实体
IFC4更改实体变得抽象。

非正式提议：
①有界曲面具有有限的非零表面积。
②有界曲面有边界曲线。

#	Attribute	Type	Cardinality	Description	C
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.	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.	X
IfcGeometricRepresentationItem
IfcSurface
	Dim :=3	IfcDimensionCount	[1:1]	The space dimensionality of IfcSurface. It is always a three-dimensional geometric representation item.	X
IfcBoundedSurface

EXPRESS Specification

ENTITY IfcBoundedSurface
 ABSTRACT SUPERTYPE OF(ONEOF(IfcBSplineSurface, IfcCurveBoundedPlane, IfcCurveBoundedSurface, IfcRectangularTrimmedSurface))
 SUBTYPE OF (IfcSurface);
END_ENTITY;