Google将会增加一个新的Meta标签“unavailable_after”，它允许我们手动指定某个网页的失效日期，以提醒Google的爬虫在该日期后不再抓取含该标签的网页。不过上周我们并不清楚这个标签到底是怎样使用的。SEL今天从Google的产品经理Dan Crow那里了解到这个标签的详情用法，下面和大家分享一下。
要使用“unavailable_after”标签，只需要在网页的头部加入以下的Meta语句即可：
< META NAME="GOOGLEBOT" CONTENT="unavailable_after: 日期 时间 时区" >
其中的日期、时间、时区（缩写）分别用23-Jul-2007、19:18:17、EST这种格式。当Google的爬虫看到网页里包含这个标签时，它不仅会不再抓取这个网页，还会在一天左右的时间内将网页从Google的搜索结果里除去。值得注意的是，Google Cache里的相关的网页快照依然会存在。要想移除Google Cache里的记录，得给网页加上noarchive标签。
摘自：G速客
仁杰高科技排名优化
提供最优势的搜索引擎排名优化、网站优化、站外优化、程序优化。有意者请联系0595-26391888
2007-8-4 23:13:25 | 字号:大 中 小
Google的unavailable_after标签的使用方法
Tags: SEO说法
发布:搜索引擎优化总监 | 分类:SEO的来源技术说法 | 评论:17 | 引用:0 | 浏览: | 字号:大 中 小
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