| 名称 | ifc rel space boundary level |
| 领域 | IFCRAIL |
| URL | http://cbims.org.cn/allscope/IFCRAIL-IfcRelSpaceBoundary1stLevel |
| 分类编码 | IfcRelSpaceBoundary1stLevel |
| 父类 | ifc rootifc rel connectsifc relationshipifc rel space boundary |
| 子类 | ifc rel space boundary level |
| 等价类 | IFCROAD:ifc rel space boundary level |