The Inter Map (also called Inter Wiki? in some other wikis) is a system for defining links between WikiWikiWeb sites that was first developed by Use Mod? and Meatball (see UseMod:InterWiki and Meatball:InterWiki). The method is to use a word shortcut that stands for a defined path. Inter Map links have the form
MapPrefix:PagePath, where the host prefix is converted to a partial URL based on entries in the site’s intermap.txt and localmap.txt files.
The default intermap.txt
The default intermap.txt distributed with PmWiki (in the scripts/ directory) includes the following Inter Map entries:
You can map your own prefixes in your local page Site.InterMap?.
Thus, “PmWiki:Variables” becomes “http://www.pmwiki.org/wiki/PmWiki/” + “Variables”, a link to the PmWiki.Variables page on the official PmWiki web site, Wiki:FrontPage is a link to the front page of the first Wiki Wiki Web, and Wikipedia:Stonehenge takes you to the Wikipedia article about the famous megaliths in England.
Usage in a wiki page
Like other links, you can use the double-bracket syntax to get different link text:
* [[Meatball:StartingPoints | starting points]] over at Meatball
* [[starting points -> Meatball:StartingPoints]] over at Meatball
If you want to link just to what the intermap says (e.g. http://www.wikipedia.com/wiki/ for Wikipedia), then do
[[Wikipedia:. | Wikipedia's main page]], which produces Wikipedia’s main page. Note the . (period) after the Map: reference.
Path: Inter Map entry can be used to create “relative urls” in links.
Custom Inter Map prefixes
The actual set of Inter Map links at any site is defined by the site administrator via the Site.InterMap? page and the local/localmap.txt file.
An intermap entry takes the following format:
The Inter Map entry can be for any of the link schemes supported by PmWiki.
You can create your own Inter Map links by doing one or more of the following:
- Modify the page called Site.InterMap? and place entries like the ones above in it.
- Create a file called local/localmap.txt and place entries like the ones above in it.
- In a WikiFarm installation you can create a file called
local/farmmap.txt and there place entries like the ones above in it.
These prefixes will be common to all the wikis in the farm.
- Ensure that there is a space after the colon.
Do not edit the file scripts/intermap.txt directly! If you do, you’ll
lose your changes when you upgrade PmWiki.
Variables and Inter Map links
It’s possible to use variables within your Inter Map entries. The following
You can also define Inter Map entries where the text of the entry is
substituted into the middle of the URL. Just include ‘$1′ in the URL where
you want the substitution to take place. For example:
Jargon:F/feature-creep to be converted to
Tips and tricks
It is possible to document your intermap prefixes directly in the page
Site.InterMap?. The extra text will not cause a performance penalty, nor
will it break the definition of prefixes. However, be aware that anything
matching a line starting with a word and a colon (:) will be
considered to define a prefix.
The order in which various sources are checked for definitions of prefixes
is controlled by the variable
$InterMapFiles. Currently the precedence
(highest to lowest is as follows):
Q Are Inter Map names case sensitive?
eAdmin: is a different Inter Map link than
Q How can I achieve a localmap.txt mapping with the effect of
Use the following:
Q How can I define an Inter Map in PHP?
Use the following:
$LinkFunctions['PmWikiHome:'] = 'LinkIMap';
$IMap['PmWikiHome:'] = 'http://pmwiki.org/wiki/$1';