Each container element has such a marker, and you can click on it to collapse or fold that element.

每个容器元素都有这样的标志，可以点击它将这个元素折叠起来。

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If the element namespace is recognized as a policy-extension namespace, unmarshal as an empty marker assertion.

如果元素名称空间被认为是一种策略扩展名称空间，那么要将它分解为一个空的标记器断言。

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"There are some signals, " Papakostas says."The problem thus far is that if you looked at a single element, a single marker or disease area, the signal was weak."

“确是有一些标识，” Papakostas 说，“但问题是，如果仅盯着单一的元素，如单个标记物或病损区，那么标识性就会变弱。”

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