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The default behavior is that articles older than 90 days are indexed. All of the methods rely on using the noindex HTML meta tag, which tells search engines not to index certain pages. Respecting the tag, especially in terms of removing already indexed content, is up to the individual search engine, and in theory the tag may be ignored entirely.
Check the crawl rate, and view statistics about when Googlebot accesses a particular site. [5] Receive alerts when Google encounters indexing, spam, or other issues on your site. [6] Show you which sites link to your website. Write and check a robots.txt file to help discover pages that are blocked in robots.txt accidentally. [7]
The forward index is sorted to transform it to an inverted index. The forward index is essentially a list of pairs consisting of a document and a word, collated by the document. Converting the forward index to an inverted index is only a matter of sorting the pairs by the words. In this regard, the inverted index is a word-sorted forward index.
This is the number of Wikipedia pages in Google's index. There is some AutoIt code at the bottom that will scrape the number of results from each datacenter at Google, but lately the easiest route has been just been grabbing the numbers from the CSV file that WikiPulse generates. You can also do a Google search for site:wikipedia.org. An ...
This category tracks pages that have had the __INDEX__ behaviour switch added to them, so that they show up in web search engines such as Google. This category is added automatically by the MediaWiki software. The category name is defined in MediaWiki:Index-category. For a list of MediaWiki-populated tracking categories, see Special ...
The noindex meta tab is merely a request to web crawlers - Google generally honors these - but some search engine may not. Finally, being available for indexed doesn't require or "push" a notice to all of the search providers of the world - it is up to them to fetch and index a page - sometimes this is fast, sometimes it takes a long time.
Because people like to see their work in search results, the search engine attempts to update in near real-time. Edits made to pages via templates can take a little longer to propagate. If you see the index lagging more than a day or so, report it. For other technical issues with the search engine, please leave a message on the talk page.
Web indexing, or Internet indexing, comprises methods for indexing the contents of a website or of the Internet as a whole. Individual websites or intranets may use a back-of-the-book index, while search engines usually use keywords and metadata to provide a more useful vocabulary for Internet or onsite searching.