All you can do is leave extension points in the schema to allow future extensions.
我们所能做的就是在模式中留下扩展点，以允许未来进行扩展。
Listing 1 contains the Batch extension point's schema definition.
清单1包括了Batch扩展点的模式定义。
The schema must declare the extension element (with three attributes: id, name, and point).
该模式必须声明extension元素(带有三个属性：id、name和point)。
The extension method is explicitly designed into the original schema.
在原始模式中显式设计extension方法。
The extension method is explicitly designed into the original schema.
在原始模式中显式设计extension方法。
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