IfcWorkPlanTypeEnum是一种枚举数据类型，指定可以从中选择相关控件的工作计划类型。
IFC4中介绍的历史。派生自IFC2.0中引入的IfcWorkControlTypeEnum。
| Constant | Description |
|---|---|
| ACTUAL | A control in which actual items undertaken are indicated. |
| BASELINE | A control that is a baseline from which changes that are made later can be recognized. |
| PLANNED | |
| USERDEFINED | |
| NOTDEFINED |
原文：https://www.cnblogs.com/herd/p/12551418.html