The default core validators ensure that the fundamental rules for topologies are met, such as the one that units with a hosting requirement have a hosting link.
默认的核心确认器确保满足了基本的拓扑规则，例如拥有安装需求的单元有一个安装链接。
You can use these validators to extend the core validation rules that are provided in the topology.
您可以使用这些确认器来扩展拓扑中所提供的核心确认器规则。
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