 | This article includes a list of general references, but it lacks sufficient corresponding inline citations .(July 2008) |
A linkback is a method for Web authors to obtain notifications when other authors link to one of their documents. This enables authors to keep track of who is linking to, or referring to, their articles. The four methods (refback, trackback, pingback and webmention) differ in how they accomplish this task.
"Linkback" is the generalized term used to reference four methods of communication between websites. While sometimes confused with one another, linkbacks and backlinks are not the same type of entity. A backlink is what the person referring to a page creates while a linkback is what the publisher of the page being referred to receives.
Any of the four terms—linkback, trackback, pingback, or (rarely) refback—might also refer colloquially to items within a section upon the linked page that display the received notifications, usually along with a reciprocal link; trackback is used most often for this purpose. Also, the word trackback is often used colloquially to mean any kind of linkback.
| Refback | Trackback | Pingback | Webmention | |
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| Trigger mechanism | Visitor to linking site clicks on the link, and their browser takes them to the linked site | Code on linking server examines added or updated documents, extracts links, and sends notification to linked server for each link found | Code on linking server examines added or updated documents, extracts links, and sends notification to linked server for each link found | Code on linking server examines added or updated documents, extracts links, and sends notification to linked server for each link found |
| Notification medium | HTTP referrer value | HTTP POST [1] | XML-RPC call | HTTP POST with source and target parameters [2] |
| Capture mechanism | Examination of incoming HTTP referrer values | Trackback capture script | XML-RPC function | Webmention capture script |
| Information sent by linking server | None |
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| Additional information presented to linked server | HTTP referrer sent by a visitor's browser upon clicking the link | IP address of linking server | IP address of linking server | IP address of linking server |
| Autodiscovery mechanism (how the linking server finds out how and where to send the notification) | None | LINK tag in the header of the linked page or trackback RDF documents | Special HTTP header or LINK tag on the linked page | HTTP Link header or link element on the linked page |
| Action required when notification is received |
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| Verifying that linking page does indeed link to linked page is recommended, not explicitly required |
| Advantages | Requires no special code on linking server (the link itself becomes the notification when someone clicks on it) | All the information desired by the linked server (Linking site name, post title, excerpt) is present in the notification itself |
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In computing, a computer file is a resource for recording data on a computer storage device, primarily identified by its filename. Just as words can be written on paper, so can data be written to a computer file. Files can be shared with and transferred between computers and mobile devices via removable media, networks, or the Internet.
The Rich Text Format is a proprietary document file format with published specification developed by Microsoft Corporation from 1987 until 2008 for cross-platform document interchange with Microsoft products. Prior to 2008, Microsoft published updated specifications for RTF with major revisions of Microsoft Word and Office versions.
Spamdexing is the deliberate manipulation of search engine indexes. It involves a number of methods, such as link building and repeating unrelated phrases, to manipulate the relevance or prominence of resources indexed in a manner inconsistent with the purpose of the indexing system.
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A trackback allows one website to notify another about an update. It is one of four types of linkback methods for website authors to request notification when somebody links to one of their documents. This enables authors to keep track of who is linking to their articles. Some weblog software, such as SilverStripe, WordPress, Drupal, and Movable Type, supports automatic pingbacks where all the links in a published article can be pinged when the article is published. The term is used colloquially for any kind of linkback.
A fire alarm notification appliance is an active fire protection component of a fire alarm system. A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action. Audible appliances have been in use longer than any other method of notification. Initially, all appliances were either electromechanical horns or electric bells, which would later be replaced by electronic sounders. Most of today's appliances produce sound levels between 70 and 100 decibels at three feet.
Spam in blogs is a form of spamdexing which utilizes internet sites which allow content to be publicly posted, in order to artificially inflate their website ranking by linking back to their web pages. Backlink helps search algorithms determine the popularity of a web page, which plays a major role for search engines like Google and Microsoft Bing to decide a web page ranking on a certain search query. This helps the spammer's website to list ahead of other sites for certain searches, which helps them to increase the number of visitors to their website.
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A pingback is one of four types of linkback methods for Web authors to request notification when somebody links to one of their documents. This enables authors to keep track of who is linking to, or referring to their articles. Some weblog software and content management systems, such as WordPress, Movable Type, Serendipity, and Telligent Community, support automatic pingbacks where all the links in a published article can be pinged when the article is published. Other content management systems, such as Drupal and Joomla, support pingbacks through the use of addons or extensions.
In a patent or patent application, the claims define in technical terms the extent, i.e. the scope, of the protection conferred by a patent, or the protection sought in a patent application. In other words, the purpose of the claims is to define which subject-matter is protected by the patent. This is termed as the "notice function" of a patent claim—to warn others of what they must not do if they are to avoid infringement liability. The claims are of paramount importance in both prosecution and litigation.
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A typographical error, also called a misprint, is a mistake made in the typing of printed or electronic material. Historically, this referred to mistakes in manual typesetting. Technically, the term includes errors due to mechanical failure or slips of the hand or finger, but excludes errors of ignorance, such as spelling errors, or changing and misuse of words such as "than" and "then". Before the arrival of printing, the copyist's mistake or scribal error was the equivalent for manuscripts. Most typos involve simple duplication, omission, transposition, or substitution of a small number of characters.
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In blogging, a ping is an XML-RPC-based push mechanism by which a weblog notifies a server that its content has been updated. An XML-RPC signal is sent from the weblog to one or more Ping servers, as specified by originating weblog), to notify a list of their "Services" of new content on the weblog.
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The Sandbox effect is a theory about the way Google ranks web pages in its index. It is the subject of much debate—its existence has been written about since 2004, but not confirmed, with several statements to the contrary.
A refback is one of four types of linkbacks, methods for Web authors to request notification when somebody links to one of their documents. This enables authors to keep track of who is linking to, or referring to their articles.
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Linked Data Notifications (LDN) is a W3C Recommendation that describes a communications protocol based on HTTP, URI, and RDF on how servers (receivers) can receive messages pushed to them by applications (senders), as well as how other applications (consumers) may retrieve those messages. Any web resource can advertise a receiving endpoint (inbox) for notification messages. Messages are expressed in RDF, and can contain arbitrary data.