Create three child Workspaces: two for alternative versions of a future-state architecture, and one for a writeable version of the current baselined architecture.
创建三个子工作区：两个为未来状态结构的替代版本创建，一个为当前基线结构的可写版本创建。
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Alternative approaches to this problem exist, such as explicit version parameters you can define during compilation to switch between header versions.
If you're looking to build membership, don't forget to consider a mobile alternative (even if it's just a differently formatted version of your current web pages) for moving your efforts along.