| 名称 | ifc rel defines |
| 领域 | IFCRAIL |
| URL | http://cbims.org.cn/allscope/IFCRAIL-IfcRelDefines |
| 分类编码 | IfcRelDefines |
| 父类 | ifc rootifc relationship |
| 子类 | ifc rel defines by objectifc rel defines by propertiesifc rel defines by typeifc rel defines by template |
| 等价类 | IFCROAD:ifc rel defines |