IFC 4.3.2.20251031 (IFC4X3_ADD2) under development

4.1.5.9 Product Span Positioning

_IfcProduct_可以相对于两个_IfcReferent_实体进行放置，这两个实体指示产品在直线段上的起始和结束位置。

下图展示了应用此概念时使用的通用类和关系。 此外，概念可能对常见或标准化的行业实践和场景具有特殊意义。对于这些特定的使用场景，下表展示了用户可采用的推荐通用使用模式列表。

G <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcProduct.htm'>IfcProduct</a> IfcProduct 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:?] EndPositionedRelativeTo      PositionedRelativeTo [0:?]      ReferencedInStructures [0:?] IfcRelPositions_0 IfcRelPositions 1. GlobalId [1:1] 2. OwnerHistory [0:1] StartPositionName 3. Name [0:1] 4. Description [0:1] 5. RelatingPositioningElement [1:1] 6. RelatedProducts [1:?] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcProduct.htm'>IfcProduct</a>:PositionedRelativeTo1->IfcRelPositions_0:RelatedProducts0 IfcRelPositions_1 IfcRelPositions 1. GlobalId [1:1] 2. OwnerHistory [0:1] EndPositionName 3. Name [0:1] 4. Description [0:1] 5. RelatingPositioningElement [1:1] 6. RelatedProducts [1:?] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcProduct.htm'>IfcProduct</a>:PositionedRelativeTo1->IfcRelPositions_1:RelatedProducts0 IfcReferent_0 IfcReferent 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:?]      ContainedInStructure [0:1]      Positions [0:?] StartPositionType 8. PredefinedType [0:1] IfcRelPositions_0:RelatingPositioningElement1->IfcReferent_0:IfcReferent0 IfcLabel_0 IfcLabel IfcRelPositions_0:Name1->IfcLabel_0:IfcLabel0 IfcReferent_1 IfcReferent 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:?]      ContainedInStructure [0:1]      Positions [0:?] EndPositionType 8. PredefinedType [0:1] IfcRelPositions_1:RelatingPositioningElement1->IfcReferent_1:IfcReferent0 IfcLabel_1 IfcLabel IfcRelPositions_1:Name1->IfcLabel_1:IfcLabel0 IfcReferentTypeEnum_0 IfcReferentTypeEnum IfcReferent_0:PredefinedType1->IfcReferentTypeEnum_0:IfcReferentTypeEnum0 IfcReferentTypeEnum_1 IfcReferentTypeEnum IfcReferent_1:PredefinedType1->IfcReferentTypeEnum_1:IfcReferentTypeEnum0
Figure 4.1.5.9.A

General Usage

ApplicableEntity
IfcProduct
表 4.1.5.9.B

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