Version 2 (modified by trac, 2 years ago) (diff)

Support for InterWiki links

(since 0.10)


An InterWiki 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, InterWiki prefixes can even be used to simply introduce links to new protocols, such as tsvn: used by TortoiseSvn.

Link Syntax


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 [interwiki] section of TracIni or in the InterMapTxt wiki page, modeled after MeatBall:InterMapTxt. If a prefix is defined in both the [interwiki] section and InterMapTxt, the [interwiki] section takes precedence.

In addition to traditional InterWiki links, where the target is simply appended to the URL, Trac supports parametric InterWiki 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.


Every option in the [interwiki] section in TracIni defines one InterWiki 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.


MeatBall =
PEP =$1.html Python Enhancement Proposal $1
tsvn = tsvn: Interact with TortoiseSvn


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$1.html           # Python Enhancement Proposal $1 
Trac-ML$1  # Message $1 in Trac Mailing List

tsvn     tsvn:                                            # Interact with TortoiseSvn


  • 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