| 序号 | 属性名称 | 中文解释 | 数据类型 | 必填 |
| GfcRoot | ||||
| GfcGeometry | ||||
| GfcTopology | ||||
| GfcPolygon | ||||
| GfcCommonPolygonEx | ||||
| 1 | LoopExs | 环列表 | LIST [0:?] OF GfcCoedgeListEx | |
| GfcFace | ||||
| 2 | Surface | 曲面 | GfcSurface | √ |
| 3 | Box | 外接包围盒 | GfcBox3d | √ |
| 4 | SameDir | 是否与Surface的法向相同 | GfcBoolean | √ |
| 5 | Index | 拓扑面的索引 | GfcInteger | √ |