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Encyclopedia > MediaWiki
For the Mediawiki namespace on Wikipedia see Wikipedia:MediaWiki namespace.
MediaWiki
MediaWiki logo
Developed by Wikimedia Foundation, Brion Vibber (release manager)
Initial release 25 January 2002
Stable release 1.12  (March 20, 2008 (2008-03-20), 8 days ago) [+/−]
Preview release SVN  (-) [+/−]
Written in PHP
OS Cross-platform
Available in over 100 languages
Genre Wiki
License GNU General Public License
Website mediawiki.org (English)

MediaWiki is a web-based wiki software application used by all projects of the Wikimedia Foundation, all wikis hosted by Wikia, and many other wikis, including some of the largest and most popular ones.[1] Originally developed to serve the needs of the free content Wikipedia encyclopedia, today it has also been deployed by companies for internal knowledge management, and as a content management system. Notably, Novell uses it to operate several of its high traffic websites.[2] Image File history File links Question_book-3. ... Wikipedia does not yet have an article with this exact name. ... Image File history File links MediaWiki-smaller-logo. ... Image File history File links Size of this preview: 413 × 599 pixelsFull resolution (1263 × 1832 pixel, file size: 430 KB, MIME type: image/png) // Screenshot of English Wikipedias main page taken on April 8th, 2006 by en:User:68. ... Other languages FAQs | Table free Welcome to Wikipedia, the free-content encyclopedia that anyone can edit. ... For other uses, see Software developer (disambiguation). ... For the wiki software used and developed by the Wikimedia Foundation, see MediaWiki. ... Wikipedia does not yet have an article with this exact name. ... is the 25th day of the year in the Gregorian calendar. ... Also see: 2002 (number). ... A software release refers to the creation and availability of a new version of a computer software product. ... is the 79th day of the year (80th in leap years) in the Gregorian calendar. ... 2008 (MMVIII) is the current year, a leap year that started on Tuesday of the Anno Domini (or common era), in accordance to the Gregorian calendar. ... A software release refers to the creation and availability of a new version of a computer software product. ... A programming language is an artificial language that can be used to control the behavior of a machine, particularly a computer. ... For other uses, see PHP (disambiguation). ... An operating system (OS) is the software that manages the sharing of the resources of a computer and provides programmers with an interface used to access those resources. ... A cross-platform (or platform independent) programming language, software application or hardware device works on more than one system platform (e. ... See Language (journal) for the linguistics journal. ... Wiki wiki redirects here. ... A software license is a legal agreement which may take the form of a proprietary or gratuitous license as well as a memorandum of contract between a producer and a user of computer software. ... GPL redirects here. ... A website (alternatively, Web site or web site) is a collection of Web pages, images, videos or other digital assets that is hosted on one or several Web server(s), usually accessible via the Internet, cell phone or a LAN. A Web page is a document, typically written in HTML... WWWs historical logo designed by Robert Cailliau The World Wide Web (commonly shortened to the Web) is a system of interlinked, hypertext documents accessed via the Internet. ... Wiki software is a type of collaborative software that runs a wiki system. ... For the wiki software used and developed by the Wikimedia Foundation, see MediaWiki. ... Wikia (no official pronunciation[2]; originally Wikicities) is a selective wiki hosting service (or wiki farm) operated by Wikia, Inc. ... Free content is any kind of functional work, artwork, or other creative content upon which no legal restriction has been placed that significantly interferes with peoples freedom to use, understand, redistribute, improve, and share the content. ... Wikipedia (IPA: , or ( ) is a multilingual, web-based, free content encyclopedia project, operated by the Wikimedia Foundation, a non-profit organization. ... Knowledge Management (KM) comprises a range of practices used by organisations to identify, create, represent, and distribute knowledge. ... A content management system (CMS) is a program used to create a framework for the content of a Web site. ... For the road bicycle racing team previously known as Novell, see Rabobank (cycling). ...


MediaWiki is written in the PHP programming language, and can use either the MySQL or PostgreSQL relational database management system. Distributed under the terms of the GNU General Public License, MediaWiki is free and open source software. For other uses, see PHP (disambiguation). ... MySQL (pronounced (IPA) , my S-Q-L[1]) is a multithreaded, multi-user SQL database management system (DBMS)[2] which has, according to MySQL AB, more than 10 million installations. ... PostgreSQL is a free software object-relational database management system (ORDBMS), released under a BSD-style license. ... A relational database management system (RDBMS) is a database management system (DBMS) that is based on the relational model as introduced by E. F. Codd. ... This page deals with mathematical distributions. ... GPL redirects here. ... Free software is software that can be used, studied, and modified without restriction, and which can be copied and redistributed in modified or unmodified form either without restriction, or with minimal restrictions only to ensure that further recipients can also do these things. ...

Contents

History

The current software was originally written for Wikipedia by Lee Daniel Crocker, based on the user interface design of Magnus Manske, a developer and student of the University of Cologne. Wikipedia had originally used a small wiki engine called UseModWiki written in Perl. Wikipedia was later switched to Manske's PHP-based software to offer more functionality. Increasing usage caused load problems, leading Crocker to re-write the software with a more scalable MySQL database backend. Later, Brion Vibber would take up the role of release manager and most active developer.[3] Wikipedia (IPA: , or ( ) is a multilingual, web-based, free content encyclopedia project, operated by the Wikimedia Foundation, a non-profit organization. ... The University of Cologne (German Universität zu Köln) is one of the oldest universities in Europe and, with over 44. ... UseModWiki is a wiki engine developed from 1999 to 2000 by Clifford Adams in the Perl programming language. ... Wikibooks has a book on the topic of Perl Programming Perl is a dynamic programming language created by Larry Wall and first released in 1987. ... MySQL (pronounced (IPA) , my S-Q-L[1]) is a multithreaded, multi-user SQL database management system (DBMS)[2] which has, according to MySQL AB, more than 10 million installations. ... Wikipedia does not yet have an article with this exact name. ...


Since the release of the first version of Manske's script, the software had been given multiple nicknames representing the state of development—"the PHP script", "phase II", "phase III", "the new codebase"—but no product name. After the Wikimedia Foundation was announced on June 20, 2003, the name "MediaWiki" was coined by Wikipedia contributor Daniel Mayer as a play on "Wikimedia," [4] and the name was gradually phased in beginning in August 2003. The name has frequently caused confusion due to its intentional similarity to the "Wikimedia" name (which itself is similar to "Wikipedia"). Nevertheless, "MediaWiki" has become a recognizable brand, with a Google search yielding over 67 million results on the name in March 2008. For the wiki software used and developed by the Wikimedia Foundation, see MediaWiki. ... is the 171st day of the year (172nd in leap years) in the Gregorian calendar. ... Year 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... This article is about the corporation. ... 2008 (MMVIII) will be a leap year starting on Tuesday of the Gregorian calendar. ...


The product logo was created by Erik Moeller using a flower photograph taken by Florence Nibart-Devouard, and was originally submitted to an international logo contest for a new Wikipedia logo held in summer 2003.[5] The logo came in third place, and was chosen to represent MediaWiki instead of Wikipedia, with the second place logo used for the Wikimedia Foundation and the first place logo for Wikipedia itself.[6] The double square brackets around the photo of a sunflower symbolize the syntax MediaWiki uses for creating hyperlinks to other wiki pages. From the left: Florence Nibart-Devouard, editor Samuel Klein, and Jimmy Wales, founder of Wikipedia and chair of the Wikimedia Foundation. ... For the wiki software used and developed by the Wikimedia Foundation, see MediaWiki. ... For other uses, see Sunflower (disambiguation). ... The syntax of a programming language is the set of rules that a sequence of characters in a source code file must follow to be considered a conforming program in that language. ... A hyperlink, or simply a link, is a reference in a hypertext document to another document or other resource. ...

Colour Meaning
Red Old release; not supported
Yellow Old release; still supported
Green Current release
Blue Future release

Release history

This table contains the release history of MediaWiki. See also Important Release History at MediaWiki.org.



Version number Date Links Notable changes
1.1 December 8, 2003 Full release notes
  • New wiki table syntax.
  • User-editable interface messages through "MediaWiki namespace".
  • XML-wrapped page source export with optional history.
  • "Magic words" – special variables and parser instructions.
1.2 March 24, 2004 Full release notes
  • Experimental web-based installer.
  • Image resizing and thumbnail generation.
  • Editing toolbar for learning wiki syntax.
  • User rights management within the wiki.
1.3 August 11, 2004 Full release notes
  • New, highly CSS-based default look and feel ("MonoBook" skin) and better web standards compliance.
  • Parametrized templates.
  • Category feature.
  • Automatic merging of edit conflicts when possible.
  • Improved installation.
1.4 March 20, 2005 Full release notes, Language support
  • User interface language can be changed by the user.
  • Significant performance improvements.
  • Support for compressing old revisions of articles to reduce storage needs.
  • Image gallery generation, list of recently uploaded images.
  • SVG rasterization support (requires external support tools).
1.5 October 5, 2005 Full release notes, Language support
  • Major database redesign decoupling text storage from revision tracking, resulting in:
    • Significant performance boosts for some operations.
    • Permalink functionality for all revisions.
    • Support for storing bulk data outside the database.
  • Support for e-mail notification upon changes.
  • Page content must be encoded in UTF-8.
1.6 April 5, 2006 Full release notes, Language support
  • The account creation form has been separated from the user login form.
  • Page protection/unprotection uses a new, expanded form.
  • "Job queue" for background updates.
  • Improved tracking of template usage.
  • Tracking of external link usage for more systematic anti-spam measures.
  • Template parameters can have default values.
1.7 July 7, 2006 Full release notes, Language support
  • MediaWiki 1.7 requires PHP 5 (5.1 recommended). PHP 4 is no longer supported.
  • Deleted files can now be restored.
1.8 October 10, 2006 Full release notes, Language support
  • Full support for PostgreSQL (8.1 or better) database backend
  • Support for DjVu thumbnailing and multipage navigation
  • Various improvements to user blocking; blocks can be placed only on unregistered users using a particular IP address
  • Uploading files from publicly accessible URLs is possible if enabled
1.9 January 10, 2007 Full release notes, Language support
  • "Undo revision" feature
  • Various improvements to blocking and special page caching
  • Tables with sortable columns
  • Addition of an edit counter field to the user database
  • Revision size displayed on watchlists and recent changes
1.10 May 9, 2007 Full release notes, Language support
  • "Cascading protection" feature
  • Improved tooltips and accesskey feature
  • Various improvements to blocking and special page caching
  • IPv6 support
1.11 September 10, 2007 Full release notes, Language support
  • $wgAddGroups and $wgRemoveGroups are added to allow finer control over usergroup assignment
  • AJAX-based page watching has been cleaned up and enabled by default
1.12 March 20, 2008 Full release notes, Language support
  • Internationalization and localization has made a huge step forward; a lot more translations, Special:Version is localizable, support for Hebrew, Thai and Iranian calendar
  • The parser has been rewritten (see also meta:Migration to the new preprocessor)
  • Various changes to user rights related stuff; behaviour of $wgAddGroups and $wgRemoveGroups has been changed, $wgGroupsAddToSelf and $wgGroupsRemoveFromSelf have been added, new "userrights-interwiki" right to edit rights on foreign wikis, ...
1.13 1.13 is just started (end of February 2008) (none yet) (none yet)

is the 342nd day of the year (343rd in leap years) in the Gregorian calendar. ... Year 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... The Extensible Markup Language (XML) is a general-purpose markup language. ... is the 83rd day of the year (84th in leap years) in the Gregorian calendar. ... Year 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ... is the 223rd day of the year (224th in leap years) in the Gregorian calendar. ... Year 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ... In web development, Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. ... is the 79th day of the year (80th in leap years) in the Gregorian calendar. ... Year 2005 (MMV) was a common year starting on Saturday (link displays full calendar) of the Gregorian calendar. ... For other uses, see 5th October (Serbia). ... Year 2005 (MMV) was a common year starting on Saturday (link displays full calendar) of the Gregorian calendar. ... Example of a permalink at Jason Kottkes blog. ... UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. ... is the 95th day of the year (96th in leap years) in the Gregorian calendar. ... Year 2006 (MMVI) was a common year starting on Sunday of the Gregorian calendar. ... is the 188th day of the year (189th in leap years) in the Gregorian calendar. ... Year 2006 (MMVI) was a common year starting on Sunday of the Gregorian calendar. ... is the 283rd day of the year (284th in leap years) in the Gregorian calendar. ... Year 2006 (MMVI) was a common year starting on Sunday of the Gregorian calendar. ... PostgreSQL is a free software object-relational database management system (ORDBMS), released under a BSD-style license. ... DjVu (pronounced déjà vu) is a computer file format designed primarily to store scanned images, especially those containing text and line drawings. ... is the 10th day of the year in the Gregorian calendar. ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... is the 129th day of the year (130th in leap years) in the Gregorian calendar. ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... Internet Protocol version 6 (IPv6) is a network layer protocol for packet-switched internetworks. ... is the 253rd day of the year (254th in leap years) in the Gregorian calendar. ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... is the 79th day of the year (80th in leap years) in the Gregorian calendar. ... 2008 (MMVIII) is the current year, a leap year that started on Tuesday of the Anno Domini (or common era), in accordance to the Gregorian calendar. ... Internationalization redirects here. ...

Key features

Editing interface of MediaWiki 1.7, showing the edit toolbar and some examples of wiki syntax.
Editing interface of MediaWiki 1.7, showing the edit toolbar and some examples of wiki syntax.

MediaWiki provides a rich core feature set and a mechanism to attach extensions to provide additional functionality. Image File history File links Download high resolution version (978x668, 133 KB) Summary Editing interface of MediaWiki, showing the Wikipedia article about MediaWiki. ... Image File history File links Download high resolution version (978x668, 133 KB) Summary Editing interface of MediaWiki, showing the Wikipedia article about MediaWiki. ... This article is about the extension mechanism. ...


Due to the strong emphasis on multilinguality in the Wikimedia projects, internationalization and localization has received significant attention by developers. The user interface has been fully or partially translated into more than 100 languages (see also translation statistics and Multilingual MediaWiki), and can be further customized by site administrators (the entire interface is editable through the wiki). Internationalization redirects here. ...


Because Wikipedia is one of the world's largest websites, achieving scalability through multiple layers of caching and database replication has also been a major concern for developers. Wikipedia and other Wikimedia projects continue to define a large part of the requirement set for MediaWiki. For other uses, see cache (disambiguation). ... Replication refers to the use of redundant resources, such as software or hardware components, to improve reliability, fault-tolerance, or performance. ...


One of the earliest differences between MediaWiki (and its predecessor, UseModWiki) and other wiki engines was the use of "free links" instead of CamelCase. Where, in a typical wiki, text like "WorldWideWeb" would have to be typed to create a link to a page about the World Wide Web, links in MediaWiki are created by surrounding words with double square brackets, and any spaces between them are left intact, e.g. [[World Wide Web]]. This change was logical for the purpose of creating an encyclopedia, where accuracy in titles is very important. This article does not cite any references or sources. ... This article does not cite any references or sources. ... WWWs historical logo designed by Robert Cailliau The World Wide Web (commonly shortened to the Web) is a system of interlinked, hypertext documents accessed via the Internet. ...


To make editing long pages such as comprehensive Wikipedia articles easier, MediaWiki allows the editing of a subsection of a page (as identified by its header).


Rich content

Images can be arranged in galleries, a feature that is used extensively for Wikimedia's media archive, Wikimedia Commons.
Images can be arranged in galleries, a feature that is used extensively for Wikimedia's media archive, Wikimedia Commons.

MediaWiki supports rich content generated through specialized syntax. For example, the software comes with support for rendering mathematical formulas using LaTeX and a special parser written in OCaml. Similar functionality for other content, ranging from graphical timelines over mathematical plotting and musical scores to Egyptian hieroglyphs, is available in the form of extensions and also aesthetic sense has improved considerably. Image File history File links Download high resolution version (644x691, 238 KB) Summary Example of MediaWikis gallery feature. ... Image File history File links Download high resolution version (644x691, 238 KB) Summary Example of MediaWikis gallery feature. ... The Wikimedia Commons (also called Wikicommons) is a repository of free content images, sound and other multimedia files. ... This article is about the typesetting system. ... Objective Caml (OCaml) is a general-purpose programming language descended from the ML family, created by Xavier Leroy, Jérôme Vouillon, Damien Doligez, Didier Rémy and others in 1996. ... Plotting is the process of depicting mathematical functions or data visually. ... Sheet music is written represenation of music. ... A section of the Papyrus of Ani showing cursive hieroglyphs. ...


As the name MediaWiki suggests, the software has become ever more powerful at dealing with a wide variety of uploaded media files. Its richest functionality is in the area of images, where image galleries and thumbnails can be generated with relative ease if the software is set up correctly. There is also support for Exif metadata. The use of MediaWiki to operate the Wikimedia Commons, one of the largest free content media archives, has driven the need for further functionality in this area. Exchangeable image file format (Exif) is a specification for the image file format used by digital cameras. ... Metadata is data about data. ... The Wikimedia Commons (also called Wikicommons) is a repository of free content images, sound and other multimedia files. ... Free content is any kind of functional work, artwork, or other creative content upon which no legal restriction has been placed that significantly interferes with peoples freedom to use, understand, redistribute, improve, and share the content. ...


MediaWiki currently provides no native WYSIWYG support, though it does come with a graphical toolbar for simplifying the process of learning the wiki syntax. It also has a simple interface to allow the transparent use of external editors for uploaded files and wiki pages. WYSIWYG (IPA Pronunciation [] or []), is an acronym for What You See Is What You Get, used in computing to describe a system in which content during editing appears very similar to the final product. ...


Organization

MediaWiki provides many features beyond hyperlinks for structuring content. One of the earliest features is namespaces. One problem for Wikipedia had long been the separation of encyclopedic content from discussions surrounding it, as well as personal pages about encyclopedia editors. Namespaces are prefixes before a page title (like "User:" or "Talk:") which allow a page to exist under multiple names, but serving different purposes depending on their prefix. For instance, a page "[[The Terminator]]" could describe the 1984 movie starring Arnold Schwarzenegger, while a page "[[User:The Terminator]]" could be a profile describing a user who chooses this name as a pseudonym. More commonly, each page has an associated "Talk:" page which can be used to discuss its contents. In general, a namespace is an abstract container, which is or could be filled by names, or technical terms, or words, and these represent (stand for) real-world things. ... This article is about the first film in the series. ... Arnold Alois Schwarzenegger (German pronunciation IPA: ) (born July 30, 1947) is an Austrian-born American bodybuilder, actor, and politician, currently serving as the 38th Governor of the U.S. state of California. ...


Namespaces can be viewed as folders which separate different basic types of information or functionality. While new namespaces can be added, the number of namespaces in a wiki is typically relatively low. Hanging file folders A file folder is a kind of folder that holds loose papers together for organization and protection. ...


In addition to namespaces, pages can be structured using subpages. This simple feature provides automatic backlinks from a page of the pattern [[Page title/Subpage title]] to the component before the slash (in this case, "Page title"). The yellow smile represents the website having the greatest number of backlinks. ...


MediaWiki supports user-created categories. These are similar to tags used in many web applications, but hierarchical and descriptive. In large wikis like Wikipedia, very complex hierarchies have grown using this system without any central planning.[7] For a proposal for tagging in Wikipedia, see Wikipedia:WikiProject Microformats#MediaWiki issues A tag cloud with terms related to Web 2. ... Wikipedia (IPA: , or ( ) is a multilingual, web-based, free content encyclopedia project, operated by the Wikimedia Foundation, a non-profit organization. ...


Customization

Users can configure custom JavaScript that is executed on every pageview. This has led to JavaScript tools that users can "install", the "navigation popup" tool shown here displays a small preview of an article when hovering over a link title.
Users can configure custom JavaScript that is executed on every pageview. This has led to JavaScript tools that users can "install", the "navigation popup" tool shown here displays a small preview of an article when hovering over a link title.

If the feature is enabled, users can customize their stylesheets and configure client-side JavaScript to be executed with every pageview. On Wikipedia, this has led to a large number of additional tools and helpers developed through the wiki and shared among users. For instance, Lupin's navigation popups is a custom JavaScript tool that shows previews of articles when the user hovers over links, and also provides shortcuts for common maintenance tasks.[8] Another example is wikEd, a full-featured MediaWiki-integrated text editor that provides syntax highlighting and search and replace functions. [9] Image File history File links Popup-preview. ... Image File history File links Popup-preview. ... JavaScript is a scripting language most often used for client-side web development. ...


The entire MediaWiki user interface can be edited through the wiki itself by users with the necessary permissions (typically so-called "administrators"). This is done through a special namespace with the prefix "MediaWiki:", where each page title identifies a particular user interface message. The "MediaWiki:" namespace was also originally used for creating custom text blocks that could then be dynamically loaded into other pages using a special syntax. This content was later moved into its own namespace, "Template:".


Templates are text blocks which can be dynamically loaded inside another page whenever that page is requested. The template "tag" is simply a special link in double curly brackets (for example "{{disputed}}") which calls the template (in this case located at Template:Disputed) to load where the tag is. Templates support parameters, so that parts of the text can be substituted for each specific use case. A related method, called template substitution (called by adding subst: at the beginning of a template tag) inserts (like a copy and paste operation) the contents of the template into the target page, instead of loading the template contents dynamically whenever the page is loaded. This limits the consistency of using templates, but may be useful in certain cases, and is (perhaps) less demanding on the server. See parenthesis for an account of the rhetorical concept from which the name of the punctuation mark is derived. ... The factual accuracy of this article is disputed. ... This page is about computer text editing. ... In information technology, a server is an application or device that performs services for connected clients as part of a client-server architecture. ...


Templates have found many different uses, such as:

  • Identifying problems with a Wikipedia article by putting a template in the article. This template will then output a graphical box stating that the article is disputed, and also categorize it so that articles of this nature can be located.
  • Creating complex table layouts which are used consistently across multiple pages, and where only the content of the tables gets inserted using template parameters.
  • Sending users standard messages when they are blocked from editing, when their behavior is considered inappropriate, and so on.
The Semantic MediaWiki extension
The Semantic MediaWiki extension

MediaWiki has the user interface in different languages. A language for the wiki content itself can also be set, to be sent in the "Content-Language" HTTP header and "lang" HTML attribute. Image File history File links Download high resolution version (799x743, 106 KB) Summary Screenshot of the Semantic MediaWiki software, from [1], taken by Eloquence. ... Image File history File links Download high resolution version (799x743, 106 KB) Summary Screenshot of the Semantic MediaWiki software, from [1], taken by Eloquence. ... The Semantic MediaWiki is an extension to Wikipedias software, which allows every user to make information more accessible to machines, which in turn makes it easier for humans to search or further use this information. ...


The MediaWiki codebase contains various "hooks" using callback functions to add additional code in an extensible way. This allows developers to write extensions without modifying the core or having to submit their code for review. Installing an extension typically consists of adding a line to the configuration file, though in some cases additional changes such as database updates are required. In computer science, a subroutine (function, method, procedure, or subprogram) is a portion of code within a larger program, which performs a specific task and can be relatively independent of the remaining code. ... Extensibility is a system design principle where the current implementation takes into consideration future growth. ...


Extensions

MediaWiki is getting more and more advanced and useful for other targets through its extensions. Many of the available extensions are simple scripts to allow embedding content such as Adobe Flash files or HTML forms. Others add complex new behavior to the wiki syntax, such as Semantic MediaWiki which provides the ability to add structured and searchable relations and attributes to wiki pages (cf. semantic web). Examples of extensions that could improve a wiki are: Adobe Flash, previously called Shockwave Flash and Macromedia Flash, is a set of multimedia technologies developed and distributed first by Adobe Systems and earlier by Macromedia. ... The Semantic MediaWiki is an extension to Wikipedias software, which allows every user to make information more accessible to machines, which in turn makes it easier for humans to search or further use this information. ... W3Cs Semantic Web logo The Semantic Web is an evolving extension of the World Wide Web in which web content can be expressed not only in natural language, but also in a format that can be read and used by software agents, thus permitting them to find, share and...

  • Ratings extension
  • Category suggestion extension
  • RSS feed inclusion
  • Flash inclusion
  • YouTube inclusion
  • etc.

The Wikimedia Foundation operates a Subversion server where many extensions are hosted, and a directory of them can be found on the MediaWiki website. Some other sites also are known for development of - or support for extensions In computing, Subversion (SVN) is a version control system (VCS) initiated in 2000 by CollabNet Inc. ...

Access and groups

While MediaWiki comes with a basic set of features related to restricting access and defining user groups, page access control does not tend to be given high priority in development. For instance, it is not possible to define the access permissions to pages on a per-namespace basis. Here, wiki engines like TWiki, MoinMoin and WikkaWiki provide more flexibility by supporting advanced security mechanisms like Access Control Lists. For the robot character, see Twiki. ... MoinMoin is a wiki engine implemented in Python. ... WikkaWiki is a lightweight and standards-compliant Wiki engine. ... In computer security, an access control list (ACL) is a list of permissions attached to an object. ...


Performance

Because it is used to run one of the highest traffic sites on the World Wide Web, Wikipedia, MediaWiki performance and scalability have been highly optimized. MediaWiki supports Squid caches, load balanced database replication, client-side caching, memcached or table-based caching for frequently accessed processing or query results, a simple static file cache, feature-reduced operation, revision compression, and a job queue for database operations. Wikipedia (IPA: , or ( ) is a multilingual, web-based, free content encyclopedia project, operated by the Wikimedia Foundation, a non-profit organization. ... It has been suggested that this article or section be merged with Scale (computing). ... Squid is a proxy server and web cache daemon. ... In computer networking, load balancing is a technique (usually performed by load balancers) to spread work between many computers, processes, hard disks or other resources in order to get optimal resource utilization and decrease computing time. ... memcached is a general-purpose distributed memory caching system that was originally developed by Danga Interactive for LiveJournal, but is now used by many other sites. ...


The software is suitable for the operation of large scale wiki farms such as Wikimedia, which has about 750 wikis as of December 2007. However, MediaWiki comes with no built-in functionality to manage such installations.
To meet Wikipedias quality standards, this article or section may require cleanup. ...


Limitations

Aside from the aforementioned lack of WYSIWYG features, user documentation is found online only (there is no printed manual). The installation and usage of the MediaWiki software is not intuitive for inexperienced computer users (compared to purpose-made software such as FrontPage, for example). WYSIWYG (IPA Pronunciation [] or []), is an acronym for What You See Is What You Get, used in computing to describe a system in which content during editing appears very similar to the final product. ... Microsoft FrontPage is a WYSIWYG HTML editor and web site administration tool from Microsoft for the Windows operating system. ...


The parser serves as the de facto standard for the MediaWiki syntax as no formal syntax has been defined. Since the syntax has no formal definition (e.g., in Extended Backus–Naur form (EBNF)) there is an inherent difficulty in creating a WYSIWYG editor or complete porting of the syntax to another language. Work is in progress to formalise the grammar in ANTLR.[10] [11] De facto is a Latin expression that means in fact or in practice. It is commonly used as opposed to de jure (meaning by law) when referring to matters of law or governance or technique (such as standards), that are found in the common experience as created or developed without... The extended Backus–Naur form (EBNF) is an extension of the basic Backus–Naur form (BNF) metasyntax notation. ... The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ...


Furthermore, there is no offline version of MediaWiki, which would enable users to update pages on their client offline, and then have those pages automatically transferred to the server when re-connected, in a similar way to the client-server operation of Lotus Notes. An offline MediaWiki client could also help users with the back-up of important pages. MediaWiki pages can be prone to vandalism, especially with sensitive information regarding politics, government, etc. Lotus Notes is a client-server collaborative software and e-mail system owned by Lotus Software, of the IBM Software Group. ...


References

  1. ^ WikiStats by S23 - List of largest wikis.
  2. ^ e.g.: http://developer.novell.com/ ; http://en.opensuse.org/ ; http://www.ifolder.com/
  3. ^ MediaWiki history. MediaWiki website. Retrieved on 2007-07-19.
  4. ^ Mayer, Daniel. Phase IV, Wikibooks.org/.com and WikimediaFoundation.org/.com (was Wikis and uniformity). Wikipedia-L mailing list archives.
  5. ^ Wikimedia contributors (2007-01-10). International logo contest/results. Meta-wiki. Wikimedia Foundation. Retrieved on 2007-03-14.
  6. ^ Wikimedia contributors (2007-01-17). Historical/Logo history. Meta-wiki. Wikimedia Foundation. Retrieved on 2007-03-14.
  7. ^ Compare Erik Zachte's category trees generated from Wikipedia category information.
  8. ^ "Lupin". Wikipedia:Tools/Navigation popups.
  9. ^ "Cacycle". wikEd.
  10. ^ Wikitext-L mailing list
  11. ^ Markup spec project (mediawiki.org)

Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... is the 200th day of the year (201st in leap years) in the Gregorian calendar. ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... is the 10th day of the year in the Gregorian calendar. ... For the wiki software used and developed by the Wikimedia Foundation, see MediaWiki. ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... is the 73rd day of the year (74th in leap years) in the Gregorian calendar. ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... is the 17th day of the year in the Gregorian calendar. ... For the wiki software used and developed by the Wikimedia Foundation, see MediaWiki. ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... is the 73rd day of the year (74th in leap years) in the Gregorian calendar. ...

Further reading

Year 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ... is the 213th day of the year (214th in leap years) in the Gregorian calendar. ...

See also

Free software Portal

Image File history File links Free_Software_Portal_Logo. ... The following tables compare general and technical information for a number of wiki software packages. ... GetWiki is an interactive PHP/MySQL application for wikis, most notably Wikinfo. ... This is a list of notable content management systems that are used to organize and facilitate collaborative content creation. ... This is a list of notable wiki software applications. ...

External links


  Results from FactBites:
 
MediaWiki - Wikipedia, the free encyclopedia (553 words)
MediaWiki 1.4 was released on March 20, 2005.
MediaWiki 1.5 was released on October 5, 2005.
MediaWiki 1.6 is the current stable version, released April 5, 2006.
MediaWiki - Wikia (290 words)
MediaWiki is the PHP-based wiki engine which runs all of the wikis on Wikia.
MediaWiki is a trademark of the Wikimedia Foundation.
MediaWiki 1.5 was first trialed on the Wikimedia sites starting around June 24, 2005, and went live on Wikia on 17 January 2006.
  More results at FactBites »

 
 

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