The new filter API lets you examine and modify a document’s structure during parsing by asking a parser to accept, skip, or remove a node and its children from the resulting tree.

新的过滤器 API 使您可以在解析期间通过请求解析器接受、忽略一个节点及其子节点或者将它们从产生的树中删除，来检查和修改文档的结构。

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CanAccept: ACTS like a filter to determine if this rule can accept this source element.

canAccept：其作用像一个过滤器，决定该规则是否可以接受资源元素。

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If a channel is required for remote administration, configure it with SSL to filter the certificate DN and accept connections from administrative users only.

如果远程管理需要使用通道，可以将其配置为使用SSL根据证书DN进行筛选，并且仅接受来自管理用户的连接。

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