#### 5.4.3.15 IfcOpeningStandardCase

| Ouverture standard
| Öffnung - Standard

The standard opening, IfcOpeningStandardCase, defines an opening with certain constraints for the dimension parameters, position within the voided element, and with certain constraints for the geometric representation. The IfcOpeningStandardCase handles all cases of openings, that:

- are true openings by cutting through the body of the voided element, that is, where the opening depth is greather than or equal to the thickness of the element,
- are extruded perpendicular to the wall plane in case of openings in a wall
- are extruded perpendicular to the slab plane in case of openings in a slab
- have a local placement relative to the local placement of the voided element
- have a 'Body' shape representation with 'SweptSolid' representation type
- have only a single extrusion body within the 'Body' shape representation

> HISTORY New entity in IFC4

## Plumbing System Design

The following concepts are inherited at supertypes:

- IfcOpeningElement: Identity, Placement, Body Geometry

Instance diagram

XSD Specification:

<xs:element name="IfcOpeningStandardCase" type="ifc:IfcOpeningStandardCase" substitutionGroup="ifc:IfcOpeningElement" nillable="true"/>
<xs:complexType name="IfcOpeningStandardCase">
<xs:complexContent>
<xs:extension base="ifc:IfcOpeningElement"/>
</xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcOpeningStandardCase

| SUBTYPE OF (IfcOpeningElement);

END_ENTITY;

Inheritance Graph:

ENTITY IfcOpeningStandardCase

| ENTITY IfcRoot

GlobalId | : | IfcGloballyUniqueId;
OwnerHistory | : | OPTIONAL IfcOwnerHistory;
Name | : | OPTIONAL IfcLabel;
Description | : | OPTIONAL IfcText;

| ENTITY IfcObjectDefinition

| INVERSE

HasAssignments | : | SET OF IfcRelAssigns FOR RelatedObjects;
Nests | : | SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy | : | SET OF IfcRelNests FOR RelatingObject;
HasContext | : | SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy | : | SET OF IfcRelAggregates FOR RelatingObject;
Decomposes | : | SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations | : | SET OF IfcRelAssociates FOR RelatedObjects;

| ENTITY IfcObject

ObjectType | : | OPTIONAL IfcStrippedOptional;

| INVERSE

IsDeclaredBy | : | SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares | : | SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy | : | SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy | : | SET OF IfcRelDefinesByProperties FOR RelatedObjects;

| ENTITY IfcProduct

ObjectPlacement | : | OPTIONAL IfcObjectPlacement;
Representation | : | OPTIONAL IfcProductRepresentation;

| INVERSE

ReferencedBy | : | SET OF IfcRelAssignsToProduct FOR RelatingProduct;

| ENTITY IfcElement

Tag | : | OPTIONAL IfcStrippedOptional;

| INVERSE

ConnectedTo | : | SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements | : | SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements | : | SET OF IfcRelInterferesElements FOR RelatingElement;
HasOpenings | : | SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
ProvidesBoundaries | : | SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom | : | SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure | : | SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;

| ENTITY IfcFeatureElement

| ENTITY IfcFeatureElementSubtraction

| INVERSE

VoidsElements | : | IfcRelVoidsElement FOR RelatedOpeningElement;

| ENTITY IfcOpeningElement

PredefinedType | : | OPTIONAL IfcStrippedOptional;

| INVERSE

| ENTITY IfcOpeningStandardCase

END_ENTITY;

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