noindex是网页HTMLMeta元素上robots的content的一个值，网络机器人看到Noindex后不会对网页进行索引，搜索引擎上因此不会出现标有noindex的网页[1][2]。网页开发者不希望索引的原因包括网页正在开发、网页所有者希望网页保持私密性等原因。
参考文献
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