IFC 4.3.2.20240512 (IFC4X3_ADD2) under development

4.1.1.2.4 Survey Elements Grouping

The assignment of survey annotations, such as point and lines, to a group. The template can be used when the order of the elements is irrelevant, for example for point clouds or collections of survey string lines.

For ordered list of survey elements, use the Survey Elements Nesting template.

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 IfcAnnotation IfcAnnotation 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1] IsAssigned      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. PredefinedType [0:1]      ContainedInStructure [0:1] IfcRelAssignsToGroup IfcRelAssignsToGroup 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1] 5. RelatedObjects [1:?] 6. RelatedObjectsType [0:1] 7. RelatingGroup [1:1] IfcAnnotation:HasAssignments1->IfcRelAssignsToGroup:RelatedObjects0 IfcAnnotationTypeEnum IfcAnnotationTypeEnum IfcAnnotation:PredefinedType1->IfcAnnotationTypeEnum:IfcAnnotationTypeEnum0 IfcLabel_0 IfcLabel IfcAnnotation:Name1->IfcLabel_0:IfcLabel0 IfcGroup IfcGroup 1. GlobalId [1:1] 2. OwnerHistory [0:1] GroupName 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:?]      IsGroupedBy [0:?]      ReferencedInStructures [0:?] IfcRelAssignsToGroup:RelatingGroup1->IfcGroup:IsGroupedBy0 constraint_2 =SURVEY IfcAnnotationTypeEnum->constraint_2 IfcLabel_1 IfcLabel IfcGroup:Name1->IfcLabel_1:IfcLabel0
Figure 4.1.1.2.4.A

General Usage

ApplicableEntity
IfcAnnotation
Table 4.1.1.2.4.B

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