IfcRelServicesBuildings是一种对象化关系，它定义了系统与它所服务的站点、建筑物、楼层、空间或空间分区之间的关系。系统示例如下：
以IFC分配系统实例为代表的建筑服务系统（供暖、冷却、废水系统）；
由IfcBuildingSystem实例表示的建筑系统（开窗、遮阳）；
■分区作为逻辑分组空间的集合，由IfcZone实例表示
■以ifcstructuralanalissismodel实例为代表的理想化结构分析系统。
■请注意，IfcRelServicesBuildings这个名称是一个已知的异常，因为这种关系不再局限于建筑物。
在IFC1.0中增加的新实体。
IFC2x CHANGE属性相关建筑的数据类型已从IfcBuilding更改为其具有向上兼容性的超类型ifcspatialstructurelement，可用于基于文件的交换。
| # | 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 | |||||
| IfcRelConnects | |||||
| IfcRelServicesBuildings | |||||
| 5 | RelatingSystem | IfcSystem | [1:1] | 为建筑物服务的系统。 | X |
| 6 | RelatedBuildings | IfcSpatialElement | S[1:?] | 系统提供服务的空间结构元素（包括场地、建筑物、楼层）。 | X |
原文：https://www.cnblogs.com/herd/p/13041199.html