%META:TOPICINFO{author="TWikiContributor" date="1530841696" format="1.1" version="28"}%
---+!! Interwiki Plugin
<!--
   Contributions to this TWiki plugin are appreciated. Please update the plugin page at
   http://twiki.org/cgi-bin/view/Plugins/InterwikiPlugin or provide feedback at
   http://twiki.org/cgi-bin/view/Plugins/InterwikiPluginDev.
   If you are a TWiki contributor please update the plugin in the SVN repository.
-->
<sticky>
<div class="twikiTocFloat">
%TOC{title="Page contents"}%
</div>
</sticky>
%SHORTDESCRIPTION%

---++ Introduction

The <nop>%TOPIC% links ==ExternalSite:Page== text to a page on an external site based on aliases defined in the %SYSTEMWEB%.InterWikis topic. This plugin is inspired by <nop>UseMod Wiki's inter-wiki links, http://www.usemod.com/cgi-bin/wiki.pl?InterWiki.

---++ Syntax Rules

   * Enter ==ExternalSite:Page== to create a link that points to the ==Page== on the ==ExternalSite== server. For example, type =RFC<nop>:2397= to get RFC:2397.
   * Enter ==[<nop>[ExternalSite:Page][any label]]== to specify a custom label.
   * All ==ExternalSite== aliases are defined in the %SYSTEMWEB%.InterWikis topic.
   * Optionally, the ==Page== can be enclosed in single quotes or double quotes. Use quotes if your ==Page== contains spaces or other special characters. Links of quoted pages are URL encoded. Example: ==Photos:"San Francisco Trip 2011"==.
   * Add and edit aliases in %SYSTEMWEB%.InterWikis (or the one specified in the =INTERWIKIPLUGIN_RULESTOPIC= setting).
   * Each entry must be of format: <br />
     ==| External site alias | URL | Tooltip help text |==
   * Site aliases must start with an upper case letter and may contain alphanumeric letters.
   * The URL and Tooltip Text may contain optional ==$page== variables; the variable gets expanded to the page name.
   * %H% For TWiki sites, both the *web* and the *topic* have to be specified: ==<nop>TWikisite:Webname/<nop>SomePage==
      * TWiki:Plugins/InterwikiPlugin or TWiki:Plugins.InterwikiPlugin

---++ <nop>%TOPIC% Settings

This plugin can be configured with preferences settings in [[%LOCALSITEPREFS%]] (site level), a WebPreferences (web level) or in a topic (page level). Do not change the settings here, they are here only to illustrate the default values. To overload, copy the settings to one of the aforementioned topics.

   * Link rules topic name: (default is =%<nop>SYSTEMWEB%.InterWikis=, pointing to %SYSTEMWEB%.InterWikis)
     %BR% =<nop>   * <nop>Set INTERWIKIPLUGIN_RULESTOPIC = %<nop>SYSTEMWEB%.InterWikis, %<nop>WEB%.InterWikis, <nop>AnotherWeb.CustomInterWikis=

   * Inter-link format, with variables:
     | $site | Site alias |
     | $page | Page (part after colon) |
     | $url | Site URL (might contain $page) |
     | $label | Equal to $site:$page |
     | $tooltip | Tooltip message |
     %BR% =<nop>   * <nop>Set INTERWIKIPLUGIN_INTERLINKFORMAT = &lt;a href="$url" title="$tooltip" class="interwikiLink"&gt;&lt;noautolink&gt;$label&lt;/noautolink&gt;&lt;/a&gt;=

---++ Plugin Installation Instructions

This plugin is pre-installed. TWiki administrators can upgrade the plugin as needed on the TWiki server.
%TWISTY{
 mode="div"
 showlink="Show details %ICONURL{toggleopen}% "
 hidelink="Hide details %ICONURL{toggleclose}% "
}%

   * *Download* the ZIP file from the TWiki:Plugins web (see below)
   * *Unzip* ==%TOPIC%.zip== in your TWiki installation directory. Content:
     | *File:* | *Description:* |
     | ==data/TWiki/%TOPIC%.txt== | Plugin topic |
     | ==data/TWiki/InterWikis.txt== | Link rules topic for inter-site links |
     | ==lib/TWiki/Plugins/%TOPIC%.pm== | Plugin Perl module |
   * *Test:* If the Plugin is correctly installed, this Wiki:InterWiki link should point to http://c2.com/cgi/wiki?InterWiki topic - try it out.
%ENDTWISTY%

---++ Plugin Info

   * One-line description, shown in the %SYSTEMWEB%.TextFormattingRules topic:
      * Set SHORTDESCRIPTION = Write ==ExternalSite:Page== to link to a page on an external site based on aliases defined in a rules topic

%TABLE{ tablewidth="100%" columnwidths="170," }%
|  Plugin Author: | TWiki:Main/AndreaSterbini, TWiki:Main/PeterThoeny |
|  Copyright: | &copy; 2001-2009 Andrea Sterbini,%BR% &copy; 2001-2018 Peter Thoeny, [[http://twiki.org/][TWiki.org]],%BR% &copy; 2001-2018 TWiki:TWiki/TWikiContributor |
|  License: | GPL ([[http://www.gnu.org/copyleft/gpl.html][GNU General Public License]]) |
|  Plugin Version: | 2018-07-05 |
%TWISTY{
 mode="div"
 showlink="Show Change History %ICONURL{toggleopen}%"
 hidelink="Hide Change History %ICONURL{toggleclose}% "
}%
%TABLE{ tablewidth="100%" columnwidths="170," }%
|  2018-07-05: | TWikibug:Item7841: Copyright update to 2018 |
|  2017-08-12: | TWikibug:Item7703: Change inter-wiki rule for TWikibug: from http://develop.twiki.org/~twiki/cgi-bin/view/Bugs to http://develop.twiki.org/do/view/Bugs/ |
|  2016-01-08: | TWikibug:Item7708: Copyright update to 2016 |
|  2015-06-18: | TWikibug:Item7568: Add "Map" rule to point to Google maps |
|  2015-02-02: | TWikibug:Item7610: Change URL of TWikibug interwiki rule from =/~twiki4/= to =/~twiki/= (server migration) |
|  2015-01-10: | TWikibug:Item7604: Switch from GPL v2 to v3 |
|  2014-10-03: | TWikibug:Item7368: More descriptive SHORTDESCRIPTION |
|  2013-02-22: | TWikibug:Item7161: Fast CGI/mod_perl unfriendly-ness fixed -- TWiki:Main.HideyoImazu |
|  2013-02-12: | TWikibug:Item7144: Add external link icons if =$cfg{Links}= is present -- TWiki:Main.MahiroAndo |
|  2013-01-28: | TWikibug:Item7091: Use TWISTY in installation instructions and change history |
|  2012-10-25: | TWikibug:Item6979: Enhance INTERWIKIPLUGIN_RULESTOPIC to accept multiple topics and to deal with variable expansion -- TWiki:Main.MahiroAndo |
|  2012-09-05: | TWikibug:Item6837: Doc fixes |
|  2010-08-04: | TWikibug:Item6786: Fix for TWiki.org specific link fix no longer working as implemented in Item6731 - bug was introduced by Item6731 -- TWiki:Main.PeterThoeny |
|  2010-06-06: | TWikibug:Item6701: Adding TWikisvn link rule -- TWiki:Main.PeterThoeny |
|  2010-05-25: | TWikibug:Item6731: Small code fixes; documentation of Timothe's enhancements -- TWiki:Main.PeterThoeny |
|  2011-05-25: | TWikibug:Item6731: Allow quotes in page pattern, and URL-encode quoted page patterns -- TWiki:Main.TimotheLitt |
|  2010-07-12: | TWikibug:Item6521 - add ~ and % to allowed characters in page part of Site:page link |
|  2010-06-23: | TWikibug:Item6503 - fix TWiki.org specific !TWiki:Web.Topic interwiki links to have .../view/Web/Topic type URLs |
|  2010-05-15: | TWikibug:Item6433 - doc improvements; replacing TWIKIWEB with SYSTEMWEB |
|  28 Feb 2009: | 17851 - TWikibug:Item5025 - Added === and =&amp;= to page regex, allowing links such as =Site:ID=1234&amp;sel=56= |
|  03 Aug 2008: | TWiki 4.2.1 release version |
|  22 Jan 2008: | TWiki 4.2.0 release version |
|  25 Nov 2007: | 15752 - TWikibug:Item5006 - Renamed Bugs rule to TWikibug rule (PTh) |
|  13 Aug 2007: | 14545 - TWikibug:Item4451 - Added Bugs: rule (TWiki:Main.CrawfordCurrie) |
|  11 Aug 2007: | 14538 - Fixed broken ISBN link (TWiki:Main.PeterThoeny) |
|  08 Nov 2006: | 11935 - Added css =class="interwikiLink"= (TWiki:Main.PeterThoeny) |
|  07 Nov 2006: | 11924 - Added INTERLINKFORMAT; removed redundant SUPPRESSTOOLTIP; allow @ signs in page part of interwiki link; support single digit page part (TWiki:Main.PeterThoeny) |
|  26 Feb 2005: | 1.008 TWiki:Main.CrawfordCurrie cleaned up code and made Dakar-ready |
|  25 Aug 2004: | 1.005 TWiki:Main.PeterThoeny updated InterWikis link rules (no code change) |
|  09 Mar 2004: | Internal changes: Use only official TWiki::Func Plugin API; for increased speed, moved Interwiki link handling from outsidePREHandler to startRenderingHandler |
|  16 Feb 2004: | Support =[<nop>[Site:Page][label]]= Interwiki links (PTh); use TWiki::Func interface for <nop>I18N regular expressions (Walter Mundt) |
|  18 Jan 2003: | Allow number sign =#= in Page name (PTh) |
|  31 Aug 2002: | Allow percent sign =%= in page name (PTh) |
|  27 Jul 2001: | Allow numbers =0-9= in site name |
|  26 Jul 2001: | Fixed alternating missed link bug due to greedy $postfixPattern (fix by Richard Donkin) |
|  14 Jul 2001: | Changed to plug & play |
|  16 Jun 2001: | Made tooltips optional; prevent ==Module::Sub== type of link |
|  12 Jun 2001: | Added optional tool tips (IE only); added the link rules topic name variable; added flexible link patterns; optional ==$page== in URL |
|  10 Jun 2001: | Changed rules topic to table-based syntax |
|  20 Feb 2001: | TWiki:Main.AndreaSterbini, TWiki:Main.PeterThoeny - Initial version |
%ENDTWISTY%
%TABLE{ tablewidth="100%" columnwidths="170," }%
|  CPAN Dependencies: | none |
|  Other Dependencies: | none |
|  Perl Version: | 5.0 |
|  [[TWiki:Plugins/Benchmark][Benchmarks]]: | %SYSTEMWEB%.GoodStyle 100%, %SYSTEMWEB%.FormattedSearch 98%, %TOPIC% 98% |
|  Plugin Home: | http://TWiki.org/cgi-bin/view/Plugins/%TOPIC% |
|  Feedback: | http://TWiki.org/cgi-bin/view/Plugins/%TOPIC%Dev |
|  Appraisal: | http://TWiki.org/cgi-bin/view/Plugins/%TOPIC%Appraisal |

__Related Topics:__ %SYSTEMWEB%.TWikiPlugins, %SYSTEMWEB%.DeveloperDocumentationCategory, %SYSTEMWEB%.AdminDocumentationCategory, %SYSTEMWEB%.TWikiPreferences, %SYSTEMWEB%.InterWikis