| 序号 | 属性名称 | 中文解释 | 数据类型 | 必填 |
| GfcRoot | ||||
| GfcRelationShip | ||||
| 1 | Name | GfcLabel | ||
| GfcRelConnects | ||||
| GfcRelConnectsElements | ||||
| 2 | RelatingElement | GfcElement | √ | |
| 3 | RelatedElement | GfcElement | √ | |
| 4 | ConnectionGeometry | GfcConnectionGeometry | √ | |
| GfcRelConnectsWithRealizingElements | ||||
| 5 | RealizingElements | GfcElement | √ | |