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BUSINESS&LAW
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ARTICLES IN THE BOOK

  1. Answers.com
  2. Bliki
  3. Blocking of Wikipedia in mainland China
  4. Blog
  5. Bomis
  6. Citizendium
  7. Collaborative editing
  8. Collaborative real-time editor
  9. Collaborative software
  10. Collaborative writing
  11. Comparison of wiki software
  12. Corporate wiki
  13. Creative Commons
  14. Enciclopedia Libre
  15. Encyclopaedia Britannica
  16. Ensemble collaboration
  17. FileReplacement
  18. Free content
  19. GNU Free Documentation License
  20. GNUpedia
  21. History of Wikipedia
  22. International Music Score Library Project
  23. InterWiki
  24. IP address
  25. Italian Wikipedia
  26. Jimmy Wales
  27. John Seigenthaler Sr. Wikipedia biography controversy
  28. Larry Sanger
  29. Lexipedia
  30. List of wikis
  31. List of wiki software
  32. Living Platform
  33. LyricWiki
  34. Nupedia
  35. Open Site
  36. Peer review
  37. Peer-to-peer wiki
  38. Personal wiki
  39. Placeopedia
  40. Reliability of Wikipedia
  41. Semapedia
  42. SourceWatch
  43. Structured wiki
  44. TWiki
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  46. Unilang
  47. Wapedia
  48. Wiki
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  50. Wikibooks
  51. Wikifonia
  52. Wikijunior
  53. Wikileaks
  54. Wikimapia
  55. Wikimedia Commons
  56. Wikimedia Foundation
  57. Wikinews
  58. Wikinfo
  59. Wikipedia
  60. 2006 Wikipedia CD Selection
  61. Wikipedia in popular culture
  62. Wikiquote
  63. Wiki software
  64. Wikisource
  65. Wikispecies
  66. Wikitext
  67. Wikitravel
  68. Wikiversity
  69. WikiWax
  70. Wikiweise
  71. WikiZnanie
  72. Wikocracy
  73. Wiktionary

 

 



WIKIPEDIA, THE FREE ENCYCLOPAEDIA
This article is from:
http://en.wikipedia.org/wiki/InterWiki

All text is available under the terms of the GNU Free Documentation License: http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License 

InterWiki

From Wikipedia, the free encyclopedia

 
For interwiki related to the Wikimedia projects, see Wikipedia:Interwikimedia link.

InterWiki is a facility for creating links to the many wiki wiki webs on the World Wide Web. Users avoid pasting in entire URLs (as they would for regular web pages) and instead use a shorthand similar to links within the same wiki (intrawiki links).

Unlike domain names on the Internet, there is no globally defined list of InterWiki prefixes and owners of a wiki must define a mapping appropriate to their needs. Users generally have to create separate accounts for each wiki they intend to use (unless they intend to edit anonymously). Variations in text formatting and layout can also hinder a seamless transition from one wiki to the next.

By making wiki links simpler to type for the members of a particular community, these features help bring the different wikis closer together. Furthering that goal, InterWiki "bus tours" (similar to webrings) have been created to explain the purposes and highlights of different wikis. Such examples on Wikipedia include Wikipedia:TourBusStop and Wikipedia:WikiNode.

Notations

InterWiki notations vary, depending largely on what kind of link pattern a wiki uses. The two most common link patterns in wikis are CamelCase and free links (arbitrary phrases surrounded by some set delimiter, such as [[double square brackets]]). CURIE syntax uses a single set of square backets.

Accordingly, InterWiki links on a CamelCase-based wiki frequently take the form of "Code:PageName", where Code is the defined InterMap prefix for another wiki. Thus, a link "WikiPedia:InterWiki" could be rendered in HTML as a link to an article on Wikipedia for example Wikipedia:Interlanguage links. Linking from a CamelCase-wiki to a page that contains spaces in its title typically requires substitution of the spaces with underscores (e.g. WikiPedia:Main_Page).

InterWiki links on wikis based on free links, such as Wikipedia, typically follow the same principle, but using the delimiters that would be used for internal links. These links can then be parsed and escaped as they would be if they were internal, allowing easier typing of spaces but potentially causing problems with other special characters. For example, on Wikipedia, [[MeatBall:AssumeGoodFaith]] appears as MeatBall:AssumeGoodFaith, and [[:de:InterWiki]] (former syntax: [[DeWikipedia:InterWiki]]) appears as de:InterWiki.

The MediaWiki software has an additional feature which uses similar notation to create automatic interlanguage links - for instance, the link [[de:InterWiki]] (with no leading colon) automatically creates a reference labelled "Other languages: Deutsch | ..." at the top and bottom of, or in a sidebar next to, the article display. Various other wiki software systems have features for "semi-internal" links of this kind, such as support for namespaces or multiple sub-communities.

Implementation

Internally, a wiki that uses InterWiki links needs to have an "InterMap" that defines the mapping from wiki-code links to full URLs. For example, [[MeatBall:InterWiki]] might appear as MeatBall:InterWiki, but link to http://usemod.com/cgi-bin/mb.pl?InterWiki.

Since most wiki systems use URLs for individual pages where the page's title appears at the end of an otherwise unchanging address, the simplest way of defining such mappings is by substituting the InterWiki prefix for the unchanging part of the URL. So in the example above, the MeatBall: has simply been replaced by http://usemod.com/cgi-bin/mb.pl? in creating the target of the HTML rendered link.

Care must be taken, however, in the handling of special characters - both those that violate local link pattern rules, and those that must be represented specially in crafting a URL for the target system. So a CamelCase-based wiki must make special provision for recognising that non-alphanumeric characters can be part of an InterWiki link, and even a free link based system may disallow local links containing characters such as '+' or '"' for technical reasons. Similarly, characters such as '?' and '&' are treated specially within URLs and may need to be converted into some other representation, as might unusual characters when linking between sites using different character encodings.

However, rather than creating a new list from scratch for every wiki, it is often useful to obtain a copy of that from another site. Sites such as MeatballWiki [1] and the UseModWiki site contain comprehensive lists which are often used for this purpose - the former being publicly editable in the same way as any other wiki page, and the latter being verified as usable but potentially out of date.

MeatballWiki uses a mechanism called FileReplacement to directly use the openly editable InterWiki map for its own pages. Changes to that map do not take effect immediately, but the InterMap configuration file is re-generated if the wiki page remains unedited for a defined period of time. This delay is intended to assure proper review of all changes to the map while not preventing open editing.

Shorthand for non-wiki sites

Most InterMap implementations simply substitute the InterWiki prefix with a full URL prefix, so many non-wiki websites can also be referred to using the system. A reference to a definition on the Free On-line Dictionary of Computing, for instance, could take the form [[Foldoc:foo]] which would tell the system to append "foo" to "http://www.foldoc.org/foldoc/foldoc.cgi?", and display the link as Foldoc:foo. This makes it very easy to link to commonly referenced resources from within a wiki page, without the need to even know the form of the URL in question.

The InterWiki concept can equally be applied to links from non-wiki websites. Advogato, for instance, offers a syntax for creating shorthand links based on a MeatBall-derived InterMap. ...

See also

  • CURIE, emerging W3C standard

External links

Look up interwiki in
Wiktionary, the free dictionary.
  • Discussion of the InterWiki concept at MeatballWiki
  • Discussion of the FileReplacement concept
Retrieved from "http://en.wikipedia.org/wiki/InterWiki"