你可以选择一个图层或者某些图层，通过用这种方法，仅显示那些层的属性。
You can use this by selecting one layer, or certain layers to show the properties for those layers only.
如前面所提到的，提倡用软件产品线方法来描述业务层中的核心的、可选的，或选择性的活动。
As noted previously, the Software Product Line approach is advocated to address the kernel, optional, or alternative activities at a business level.
在某些情况下，希望用tree prompt选择值，但是要求只用特定的一层筛选报表。
In some cases, a tree prompt may be desirable for a value selection, but only one of the levels is required to filter the report.
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