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"A webmaster posted a question at both Search Engine Roundtable Forums Search Engine Watch Forums asking what is the htdig-noindex meta tag do.Both threads point to http://www.htdig.org/, which is an open source search engine.  This open search search engine, named ht://Dig supports a noindex meta tag \"htdig-noindex.\"  So if you want to block this search engine from indexing you, just add:&amp;lt;meta name=\"htdig-noindex\"&amp;gt;The search engine recognizes and supports the following meta tags:\nhtdig-keywordshtdig-noindexhtdig-emailhtdig-notification-datehtdig-email-subjectrobotskeywordsdescription\nForum discussion at Search Engine Roundtable Forums Search Engine Watch Forums."^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/012810.html>