IFC 4.3.2.20251031 (IFC4X3_ADD2) under development

4.1.3.5 Object User Identity

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对象可以被标记以供人类识别,其中 Name 可以指示一个广为人知的标识符。虽然对此类标识符的使用没有限制,但建议 Name 在其包含的范围内是唯一的。特定实体提供了进一步的使用指南;例如,对于空间,Name 可以反映房间号。对象可以通过 Description 特性提供描述,该描述提供了识别或定位对象的进一步上下文。

特定子类型为 Object User Identity 模板引入了附加特性。

  • 空间对象可以通过 LongName 特性进一步识别。此值通常应对应于描述楼层或房间的建筑标牌。虽然 Name 特性通常提供一个编码的或缩写的标识符,但 LongName 提供了一个功能性的位置名称,例如“接待区”。请参阅概念模板 Spatial Element Occurrence Attributes
  • 物理元素可以通过 Tag 特性进一步识别。这是一个人类可读的标识符,例如元素或项目编号。虽然对此类标签的使用没有限制,但建议 Tag 在其包含的范围内是唯一的。请参阅概念模板 Element Occurrence Attributes

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/IfcObject.htm'>IfcObject</a> IfcObject 1. GlobalId [1:1] 2. OwnerHistory [0:1] ObjectName 3. Name [0:1] ObjectDescription 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:?] IfcLabel_0 IfcLabel <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcObject.htm'>IfcObject</a>:Name1->IfcLabel_0:IfcLabel0 IfcText_0 IfcText <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcObject.htm'>IfcObject</a>:Description1->IfcText_0:IfcText0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcRelDefinesByType.htm'>IfcRelDefinesByType</a> IfcRelDefinesByType 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1] 5. RelatedObjects [1:?] 6. RelatingType [1:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcObject.htm'>IfcObject</a>:IsTypedBy1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcRelDefinesByType.htm'>IfcRelDefinesByType</a>:RelatedObjects0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTypeObject.htm'>IfcTypeObject</a> IfcTypeObject 1. GlobalId [1:1] 2. OwnerHistory [0:1] TypeName 3. Name [0:1] TypeDescription 4. Description [0:1]      HasAssignments [0:?]      Nests [0:1]      IsNestedBy [0:?]      HasContext [0:1]      IsDecomposedBy [0:?]      Decomposes [0:1]      HasAssociations [0:?] 5. ApplicableOccurrence [0:1] 6. HasPropertySets [1:?]      Types [0:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcRelDefinesByType.htm'>IfcRelDefinesByType</a>:RelatingType1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTypeObject.htm'>IfcTypeObject</a>:IfcTypeObject0 IfcLabel_1 IfcLabel <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTypeObject.htm'>IfcTypeObject</a>:Name1->IfcLabel_1:IfcLabel0 IfcText_1 IfcText <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTypeObject.htm'>IfcTypeObject</a>:Description1->IfcText_1:IfcText0
Figure 4.1.3.5.A

General Usage

ApplicableEntity
IfcObject
表 4.1.3.5.B