如未另行说明，那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可，并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情，请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC)：2024-09-03。
[null,null,["最后更新时间 (UTC)：2024-09-03。"],[[["SiteNavigationElement extends the WebPageElement type and is used for markup within Gmail."],["This element type does not have any unique properties, inheriting its functionality from WebPageElement."],["It's specifically for defining navigation elements within a webpage, as understood by Gmail's markup system."]]],["The `SiteNavigationElement` type, which extends `WebPageElement`, is defined. Crucially, this type is noted to have no specific properties associated with it. The key information is the existence of the `SiteNavigationElement` type and its relationship to `WebPageElement`, alongside the specification that it lacks any unique properties.\n"]]