| 名称 | ifc relationship |
| 领域 | IFCRAIL |
| URL | http://cbims.org.cn/allscope/IFCRAIL-IfcRelationship |
| 分类编码 | IfcRelationship |
| 父类 | ifc root |
| 子类 | ifc rel assignsifc rel connectsifc rel declaresifc rel definesifc rel associatesifc rel decomposes |
| 等价类 | IFCROAD:ifc relationship |