Support for Inter Wiki links
Definition
An Inter Wiki link can be used for referring to a Wiki page located in another Wiki system, and by extension, to any object located in any other Web application, provided a simple URL mapping can be done.
At the extreme, Inter Wiki prefixes can even be used to simply introduce links 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, eg MeatBall:, followed by a page specification in the target. Note that, as for Inter Trac prefixes, Inter Wiki prefixes are case insensitive.
The target Wiki URL is looked up in the [interwiki] section of Trac Ini or in the Inter Map Txt wiki page, modeled after MeatBall:InterMapTxt. If a prefix is defined in both the [interwiki] section and Inter Map Txt, the [interwiki] section takes precedence.
In addition to traditional Inter Wiki links, where the target is simply appended to the URL, Trac supports parametric Inter Wiki URLs: identifiers $1, $2, ... in the URL will be replaced by corresponding arguments. The argument list is formed by splitting the page identifier using the ":" separator.
[interwiki]
Every option in the [interwiki] section in Trac Ini defines one Inter Wiki prefix. The option name defines the prefix. The option value defines the URL, optionally followed by a description separated from the URL by whitespace. Parametric URLs are supported as well.
Example:
[interwiki] MeatBall = http://www.usemod.com/cgi-bin/mb.pl? PEP = http://www.python.org/peps/pep-$1.html Python Enhancement Proposal $1 tsvn = tsvn: Interact with TortoiseSvn
Examples
If the following is an excerpt of the Inter Map Txt 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 List
tsvn 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: Inter Trac, Inter Map Txt
