如果您要同时使用DTD和名称空间，通过指定特定的前缀并把它们当作元素和属性名称的固定部分就可以做到了。

If you want to use DTDs and namespaces together, you can do so by designating specific prefixes and treating them as fixed parts of the element and attribute names.

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绑定目标的方法和属性必须是固定的。

The methods and attributes of your binding target must be fixed.

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每个属性旁边的图标表示使用固定值还是可变值。

The icon beside each property indicates the use of fixed or variable values.

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