= Support for InterWiki links =''(since [milestone:0.10])''== Definition ==An InterWiki link can be used for referring to a Wiki pagelocated in another Wiki system, and by extension, to any objectlocated in any other Web application, provided a simple URL mapping can be done.At the extreme, InterWiki prefixes can even be used to simply introducelinks to new protocols, such as `tsvn:` used by TortoiseSvn.== Link Syntax =={{{<target_wiki>(:<identifier>)+}}}The link is composed by the targeted Wiki (or system) name,followed by a colon (e.g. `MeatBall:`),followed by a page specification in the target.Note that, as for InterTrac prefixes, '''InterWiki prefixes are case insensitive'''.The target Wiki URL is looked up in the InterMapTxt wiki page, modelled after MeatBall:InterMapTxt.In addition to traditional InterWiki links, where the targetis simply ''appended'' to the URL, Trac supports parametric InterWiki URLs:identifiers `$1`, `$2`, ... in the URLwill be replaced by corresponding arguments.The argument list is formed by splitting the page identifierusing the ":" separator.== Examples ==If the following is an excerpt of the InterMapTxt page:{{{= InterMapTxt === This is the place for defining InterWiki prefixes ==Currently active prefixes: [[InterWiki]]This page is modelled after the MeatBall:InterMapTxt page.In addition, an optional comment is allowed after the mapping.----{{{PEP      http://www.python.org/peps/pep-$1.html           # Python Enhancement Proposal $1 Trac-ML  http://thread.gmane.org/gmane.comp.version-control.subversion.trac.general/$1  # Message $1 in Trac Mailing Listtsvn     tsvn:                                            # Interact with TortoiseSvn...MeatBall http://www.usemod.com/cgi-bin/mb.pl?MetaWiki http://sunir.org/apps/meta.pl?MetaWikiPedia http://meta.wikipedia.org/wiki/MoinMoin http://moinmoin.wikiwikiweb.de/...}}}}}}Then,  * `MoinMoin:InterWikiMap` should be rendered as MoinMoin:InterWikiMap   and the ''title'' for that link would be "!InterWikiMap in !MoinMoin" * `Trac-ML:4346` should be rendered as Trac-ML:4346   and the ''title'' for that link would be "Message 4346 in Trac Mailing List"----See also: InterTrac, InterMapTxt