Despite the use of the terms "allow" and "disallow", the protocol is purely advisory and relies on the compliance of the web robot. Malicious web robots are unlikely to honor robots.txt; some may even use the robots.txt as a guide to find disallowed links and go straight to them.
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The robots exclusion standard, also known as the robots exclusion protocol or simply robots.txt, is a standard used by websites to communicate with web crawlers and other web robots. The standard specifies how to inform the web robot about which areas of the website should not be processed or scanned. Robots are often used by search engines to categorize websites.
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An Internet bot, web robot, robot or simply bot, is a software application that runs automated tasks (scripts) over the Internet. Typically, bots perform tasks that are simple and repetitive, much faster than a person could. The most extensive use of bots is for web crawling, in which an automated script fetches, analyzes and files information from web servers. More than half of all web traffic is generated by bots.
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There were more than ten million entries on AboutUs.com as of March 2008, and new pages are added at a rate of about 25,000 a day. Most entries were created by a web robot (bot); web searches by users direct the bot to create a page for a web domain. In many cases the content is simply a republication of the contents of the "About us", "About me", or similar page on the website.
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Internet bots, also known as a web robot, robot or simply bot, is a software application that runs automated tasks (scripts) over the Internet. Typically, bots perform tasks that are both simple and structurally repetitive, at a much higher rate than would be possible for a human alone. The largest use of bots is in web spidering, in which an automated script fetches, analyzes and files information from web servers at many times the speed of a human. More than half of all web traffic is made up of bots.
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Singingfish employed its own web crawler, Asterias,Web Robot Articles by Janet Systems designed specifically to ferret out audio and video links across the web. In 2003 and 2004, Asterias discovered an average of about 50,000 new pieces of multimedia content a day. A proprietary system was used to process each of the discovered links, extracting metadata and then enhancing it prior to indexing as much multimedia content on the web has little or poor metadata. Many of the multimedia URLs used as seeds for Singingfish's crawlers and annotation engines came from cache logs from the NSF-funded National Laboratory for Applied Network Research (NLANR) IRCache Web Caching project.
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The World Wide Web Wanderer, also referred to as just the Wanderer, was a Perl-based web crawler that was first deployed in June 1993 to measure the size of the World Wide Web. The Wanderer was developed at the Massachusetts Institute of Technology by Matthew Gray, who, as of 2017, has spent a decade as a software engineer at Google. The crawler was used to generate an index called the Wandex later in 1993. While the Wanderer was probably the first web robot, and, with its index, clearly had the potential to become a general- purpose WWW search engine, the author does not make this claimMatthew Gray's home page Pertinent page on Matthew Gray's section on MIT site and elsewhereBrian LaMacchia's PhD thesis, section 1.2.
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