对象化关系（ifcreassociatesdocument）处理将文档信息（select IfcDocumentSelect的项）分配给对象引用（IfcObject的子类型）或对象类型（IfcTypeObject的子类型）。
此关系用于将文档引用或更详细的文档信息分配给对象。一个文档引用可以应用于多个对象。
继承的属性RelatedObjects定义应用文档关联的对象。属性RelatingDocument是对应用于对象的文档引用的引用。
在IFC2x中增加的新实体。
| # | Attribute | Type | Cardinality | Description | C |
|---|---|---|---|---|---|
| IfcRoot | |||||
| 1 | GlobalId | IfcGloballyUniqueId | [1:1] | Assignment of a globally unique identifier within the entire software world. | X |
| 2 | OwnerHistory | IfcOwnerHistory | [0:1] | Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,
NOTE only the last modification in stored - either as addition, deletion or modification. |
X |
| 3 | Name | IfcLabel | [0:1] | Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule. | X |
| 4 | Description | IfcText | [0:1] | Optional description, provided for exchanging informative comments. | X |
| IfcRelationship | |||||
| IfcRelAssociates | |||||
| 5 | RelatedObjects | IfcDefinitionSelect | S[1:?] | 与外部引用或信息关联的对象或属性定义集。它包括对象和类型对象、属性集模板、属性模板以及属性集和上下文。 | X |
| IfcRelAssociatesDocument | |||||
| 6 | RelatingDocument | IfcDocumentSelect | [1:1] | 应用于对象的文档信息或引用。 | X |