Verify that the content models of specialized elements are more restrictive than their general equivalents.
验证专门化元素的内容模型比它们常规的等价部分更具限制性。
An example implementation scenario might be if a class had type limitations for possible child elements that are significantly more restrictive than the WPF framework-level layout system.
一种实作案例的范例可能是，如果类别针对可能的子项目设定型别限制，则这些子项目明显会比WPF架构层级配置系统更具限制性。
An example implementation scenario might be if a class had type limitations for possible child elements that are significantly more restrictive than the WPF framework-level layout system.
一种实作案例的范例可能是，如果类别针对可能的子项目设定型别限制，则这些子项目明显会比WPF架构层级配置系统更具限制性。
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