IfcSectionedSolid

Item	SPF	XML	Change	Description
IFC4x1 Release Candidate 3
IfcSectionedSolid			ADDED

Semantic definitions at the entity

Entity definition

An IfcSectionedSolid is an abstract base type for solids constructed by sweeping potentially variable cross sections along a directrix.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	Directrix	IfcCurve		The curve used to define the sweeping operation.	X
2	CrossSections	IfcProfileDef	L[2:?]	List of cross sections in sequential order along the Directrix.	X

Formal Propositions

Rule	Description
DirectrixIs3D	The curve entity which is the underlying directrix shall have the dimensionality of 3.
ConsistentProfileTypes	The profile type (either AREA or CURVE) shall be consistent within the list of the profiles defining the cross sections.
SectionsSameType	The entity type for each section must be the same.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
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
IfcGeometricRepresentationItem
IfcSolidModel
	Dim :=3	IfcDimensionCount		The space dimensionality of this class, it is always 3.	X
IfcSectionedSolid
1	Directrix	IfcCurve		The curve used to define the sweeping operation.	X
2	CrossSections	IfcProfileDef	L[2:?]	List of cross sections in sequential order along the Directrix.	X

Formal representations

XML Specification

 <xs:element name="IfcSectionedSolid" type="ifc:IfcSectionedSolid" abstract="true" substitutionGroup="ifc:IfcSolidModel" nillable="true"/>

 <xs:complexType name="IfcSectionedSolid" abstract="true">

  <xs:complexContent>

   <xs:extension base="ifc:IfcSolidModel">

    <xs:sequence>

     <xs:element name="Directrix" type="ifc:IfcCurve" nillable="true"/>

     <xs:element name="CrossSections">

      <xs:complexType>

       <xs:sequence>

        <xs:element ref="ifc:IfcProfileDef" minOccurs="2" maxOccurs="unbounded"/>

       </xs:sequence>

       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcProfileDef"/>

       <xs:attribute ref="ifc:cType" fixed="list"/>

       <xs:attribute ref="ifc:arraySize" use="optional"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcSectionedSolid

 ABSTRACT SUPERTYPE OF(IfcSectionedSolidHorizontal)

 SUBTYPE OF (IfcSolidModel);

  Directrix : IfcCurve;

  CrossSections : LIST [2:?] OF IfcProfileDef;

 WHERE

  DirectrixIs3D : Directrix.Dim = 3;
  ConsistentProfileTypes : SIZEOF(QUERY(temp <* CrossSections | CrossSections[1].ProfileType <> temp.ProfileType)) = 0;
  SectionsSameType : SIZEOF(QUERY(temp <* CrossSections | TYPEOF(CrossSections[1]) :<>: TYPEOF(temp))) = 0;
END_ENTITY;

 EXPRESS-G diagram