4.1.4.2 Element Projecting 
    The following diagram shows the generic classes and relationships used when applying this concept.
    
    In addition, concepts may have particular importance to common or standardised industry practices and scenarios. For these specific usage scenarios, the table below shows a recommended list of general usage patterns that users may adopt.
    
G 
 
IfcElement  
 
 
IfcElement  
 
 
 
 
1. GlobalId 
 
 
[1:1] 
 
 
2. OwnerHistory 
 
 
[0:1] 
 
 
3. Name 
 
 
[0:1] 
 
 
4. Description 
 
 
[0:1] 
 
 
      HasAssignments 
 
 
[0:?] 
 
 
      Nests 
 
 
[0:1] 
 
 
      IsNestedBy 
 
 
[0:?] 
 
 
      HasContext 
 
 
[0:1] 
 
 
      IsDecomposedBy 
 
 
[0:?] 
 
 
      Decomposes 
 
 
[0:1] 
 
 
      HasAssociations 
 
 
[0:?] 
 
 
5. ObjectType 
 
 
[0:1] 
 
 
      IsDeclaredBy 
 
 
[0:1] 
 
 
      Declares 
 
 
[0:?] 
 
 
      IsTypedBy 
 
 
[0:1] 
 
 
      IsDefinedBy 
 
 
[0:?] 
 
 
6. ObjectPlacement 
 
 
[0:1] 
 
 
7. Representation 
 
 
[0:1] 
 
 
      ReferencedBy 
 
 
[0:?] 
 
 
      PositionedRelativeTo 
 
 
[0:?] 
 
 
      ReferencedInStructures 
 
 
[0:?] 
 
 
8. Tag 
 
 
[0:1] 
 
 
      FillsVoids 
 
 
[0:1] 
 
 
      ConnectedTo 
 
 
[0:?] 
 
 
      IsInterferedByElements 
 
 
[0:?] 
 
 
      InterferesElements 
 
 
[0:?] 
 
 
      HasProjections 
 
 
[0:?] 
 
 
      HasOpenings 
 
 
[0:?] 
 
 
      IsConnectionRealization 
 
 
[0:?] 
 
 
      ProvidesBoundaries 
 
 
[0:?] 
 
 
      ConnectedFrom 
 
 
[0:?] 
 
 
      ContainedInStructure 
 
 
[0:1] 
 
 
      HasCoverings 
 
 
[0:?] 
 
 
      HasSurfaceFeatures 
 
 
[0:?] 
 
IfcRelProjectsElement  
 
 
IfcRelProjectsElement  
 
 
 
 
1. GlobalId 
 
 
[1:1] 
 
 
2. OwnerHistory 
 
 
[0:1] 
 
 
3. Name 
 
 
[0:1] 
 
 
4. Description 
 
 
[0:1] 
 
 
5. RelatingElement 
 
 
[1:1] 
 
 
6. RelatedFeatureElement 
 
 
[1:1] 
 
IfcElement :HasProjections1->IfcRelProjectsElement :RelatingElement0 
 
 
 
IfcProjectionElement  
 
 
IfcProjectionElement  
 
 
 
 
1. GlobalId 
 
 
[1:1] 
 
 
2. OwnerHistory 
 
 
[0:1] 
 
 
3. Name 
 
 
[0:1] 
 
 
4. Description 
 
 
[0:1] 
 
 
      HasAssignments 
 
 
[0:?] 
 
 
      Nests 
 
 
[0:1] 
 
 
      IsNestedBy 
 
 
[0:?] 
 
 
      HasContext 
 
 
[0:1] 
 
 
      IsDecomposedBy 
 
 
[0:?] 
 
 
      Decomposes 
 
 
[0:1] 
 
 
      HasAssociations 
 
 
[0:?] 
 
 
5. ObjectType 
 
 
[0:1] 
 
 
      IsDeclaredBy 
 
 
[0:1] 
 
 
      Declares 
 
 
[0:?] 
 
 
      IsTypedBy 
 
 
[0:1] 
 
 
      IsDefinedBy 
 
 
[0:?] 
 
 
6. ObjectPlacement 
 
 
[0:1] 
 
 
7. Representation 
 
 
[0:1] 
 
 
      ReferencedBy 
 
 
[0:?] 
 
 
      PositionedRelativeTo 
 
 
[0:?] 
 
 
      ReferencedInStructures 
 
 
[0:?] 
 
 
8. Tag 
 
 
[0:1] 
 
 
      FillsVoids 
 
 
[0:1] 
 
 
      ConnectedTo 
 
 
[0:?] 
 
 
      IsInterferedByElements 
 
 
[0:?] 
 
 
      InterferesElements 
 
 
[0:?] 
 
 
      HasProjections 
 
 
[0:?] 
 
 
      HasOpenings 
 
 
[0:?] 
 
 
      IsConnectionRealization 
 
 
[0:?] 
 
 
      ProvidesBoundaries 
 
 
[0:?] 
 
 
      ConnectedFrom 
 
 
[0:?] 
 
 
      ContainedInStructure 
 
 
[0:1] 
 
 
      HasCoverings 
 
 
[0:?] 
 
 
      HasSurfaceFeatures 
 
 
[0:?] 
 
 
      ProjectsElements 
 
 
[1:1] 
 
 
9. PredefinedType 
 
 
[0:1] 
 
IfcRelProjectsElement :RelatedFeatureElement1->IfcProjectionElement :IfcProjectionElement0 
 
 
 
IfcProjectionElementTypeEnum  
 
 
IfcProjectionElementTypeEnum  
 
 
 
IfcProjectionElement :PredefinedType1->IfcProjectionElementTypeEnum :IfcProjectionElementTypeEnum0 
 
 
 
 
 Figure 4.1.4.2.A  
 General UsageTable 4.1.4.2.B