A simple search engine query might locate an appropriate alternative, but be extremely careful to avoid citing mirrors and forks of wikipedia itself, which would violate wikipedia:Verifiability. Sometimes, finding an appropriate source is not possible, or would require more extensive research techniques, such as a visit to a library or the use of a subscription-based database. If that is the case, consider consulting with wikipedia editors at wikipedia:wikiproject Resource Exchange, the wikipedia:Village pump, or wikipedia:Help desk. Also, consider contacting experts or other interested editors at a relevant wikiproject. Keeping dead links A dead, unarchived source url may still be useful. Such a link indicates that information was (probably) verifiable in the past, and the link might provide another user with greater resources or expertise with enough information to find the reference.
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If that parameter is not specified, a search of the article's revision history can be performed to determine when the link was added to the article. View the archive to verify that it contains valid page information. Sometimes archives are actually archives of the fact that the link is dead, or that the archiving failed. If this is the case, try using an archive from a different date. Usually dates closer to the time the link was placed in the wikipedia page, or earlier, are more likely to show valid information. Different archiving sites should also be tried. If an archived version of a page is found for which the dead link supplied little information, the additional information may be enough, with a little extra work, to find a live copy.
An example of this is trying to find archives of Battle of the Atlantic. As of April 2014, Archive. Org reports it has 63 or 64 archives ( https, http ). Mementos essay reports 0 archives ( https, http ). Mementos usually finds archives at legs Archive. Org, but sometimes Mementos does not even when archives exist. If you try mementos first, don't assume that there really are no archives if Mementos reports that there are none. There are many Internet archive projects in existence. When multiple archive dates are available, try to use the one that is most likely to be the contents of the page seen by the editor who entered the reference on the accessdate.
Unfortunately, the mementos webpage interface removes any parameters which are included with the url. If the url contains a "?" it is unlikely to work properly when entered manually without changes. When entering the url into the mementos interface manually, the most common change needed is to change "?" to "3F". While making only this change will not be sufficient in all cases, it will work most of the time. The bookmarklet in the table below will properly encode urls such that searches will work. Mementos looks like it is, or at least will be, very convenient. However, if archives are not found at Mementos, it should not be the only site checked. Mementos can sometimes return no results when archives exist at sites which it normally includes.
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For the related guideline, see wp:deadref. There are several ways to try to repair a dead link, detailed below: searching If the dead link includes enough information (article title, names, etc.) it is often possible to use it to find the web page at a different location, either on the same. Search the site Often web pages have simply moved, either in connection with a migration to a new server, or through general site maintenance. A site index or site-specific search feature is a useful place to locate the moved bahasa page. If these tools are not available, many Internet search engines allow a search on a specified site. Search the Internet A search engine query using the title of the page, possibly with a search restriction to the same site, might find the page. Using the examples from above, a web search (such as google, yahoo, etc.) might look like one of these: site:m/ "Wall Street journal paywall Sturdier Than Suspected" site:m/ "Wall Street journal paywall Sturdier Than Suspected" "Wall Street journal paywall Sturdier Than Suspected" Also, a search.
A search through google for ail. Mit.edu sfft paper pdf leads to a page enabling this fix. A search for an unusual or unique-looking substring of the url, such as just the filename at the end, is often fruitful. Internet archives Check for archived versions of the page in the archiving services. If you find an archived version of the dead link, double-check to make sure that citation still supports the article text. It is also a good idea to consult the access date of the citation (if it was specified, or a history search for when it was added) to see how contemporaneous this archived version is to the link when it was cited. The following archiving services are considered to be reliable: The mementos interface allows you to search multiple archiving services for archived versions of some pages with a single request using the memento protocol.
Luckily, in this case, not only can the content be found on a new site that is still open to archiving, but the site's robots. Txt later changed to allow archiving again, and so the old archives are now unhidden ( example ). Alternative methods Most citation templates have a" parameter that can be used to store text"s of the source material. This can be used to store a limited amount of text from the source within the citation template. This is especially useful for sources that cannot be archived with web archiving services.
It can also provide insurance against failure of the chosen web archiving service. "Wall Street journal paywall Sturdier Than Suspected". The new York times Company. Archived from the original.the wall Street journal will not, as has been widely speculated, tear down its paywall entirely. When using the" parameter, choose the most succinct and relevant material possible that preserves the context of the reference. Storing the entire text of the source is not appropriate under fair use policies, so choose only the most important portions of the text that most support the assertions in the wikipedia article. A" also helps searching for other on-line versions of the source in the event that the original is discontinued. Where applicable, public domain materials can be copied to wikisource. Repairing a dead link "WP:deadlink" redirects here.
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As you edit, if an article has bare urls in its citations, fix them or at least tag the references section with linkrot as a reminder to complete citation details as above, and to categorize the article as needing cleanup. Web archive services see also: wikipedia:List of web selling archives on wikipedia and wikipedia:Citing sources/Further considerations Pre-emptive archiving A second way to prevent link rot is to use a web archiving service. The two most popular services are the wayback machine, which crawls and archives many web pages as well as having a form to suggest a url to be archived, note 1 and WebCite, which provides on-demand web archiving. These services collect and preserve web pages for future use even if the original web page is moved, changed, deleted, or placed behind a pay wall. Web archiving is especially important when citing web pages that are unstable or prone to changes, like time sensitive news articles or pages hosted by financially distressed organizations. Once you have the url for the archived version of the web page, use the archiveurl and archivedate parameters in the citation template that you are using. The template will automatically incorporate the archived link into reference.
can help prevent link rot in several ways. The first way to prevent link rot is to avoid bare urls by recording as much of the exact title, author, publisher and date of the source as possible. Optionally, also add the accessdate. If the link goes bad, this added information can help a future wikipedian, either editor or reader, locate a new source for the original text, either online or a print copy. This may be impossible with only an isolated, bare url that no longer works. Local and school libraries are a good resource for locating such offline sources. Many local libraries have in-house subscriptions to digital databases or inter-library loan agreements, making it easier to retrieve hard-to-find sources.
Therefore, prevention of link rot strengthens the encyclopedia. This guide provides strategies for preventing link rot before it happens. These include the use of web archiving services and the judicious use of citation templates. Editors are encouraged to add an archive link as a part of each citation, or at least submit the referenced url for archiving, note 1 at the same time that a citation is created or updated. However, link rot cannot always be prevented, so this guide also explains how to mitigate link rot by finding previously archived links and other sources. These strategies should be implemented in accordance with. Wikipedia:Citing sourcesPreventing and repairing dead links, which describes the steps to take when a link cannot be repaired. Except for urls in the, external links section that have not been used to support any article content, do not delete business cited information solely because the url to the source does not work any longer.
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This page is about (primarily) link rot in external best links. For broken section links within wikipedia, see. Wikipedia:Database reports/Broken section anchors. For internal links which point to deleted or non-existent articles, see. For other uses, see, wikipedia:Citing sources Preventing and repairing dead links. For lua requests, see. Like most large websites, wikipedia suffers from the phenomenon known as link rot, where external links, often used as references and citations, gradually become irrelevant or broken (also called a dead link as the linked websites disappear, change their content, or move. This presents a significant threat to wikipedia's reliability policy and its source citation guideline. The effort required to prevent link rot is significantly less than the effort required to repair or mitigate a rotten link.