URLs starting with file, ftp, gopher, http, https, irc, mailto, news, nntp and telnet are linked automatically if preceded by whitespace or parenthesis. External links are indicated with a trailing icon, and open up in a new browser tab or window; the behavior of both can be set in configure or preferences variables. Links can be prevented with an ! exclamation point prefix.
Note: if a link is written directly as HTML (<a href="http://...">...</a>), it is not subject to the external link conversion.
Preferences Variables
Users can customize the behavior of the external links (typically in the WebPreferences page).
Open external links in a new browser tab or window
EXTERNALLINKSICON
on/off
Show a trailing icon
INTERNALLINKDOMAINS
(see below)
Add domain names that should not be regarded as "external"
The value of INTERNALLINKDOMAINS is expected to be a comma-separated list of domain names.
Each domain name entry should be any of the below:
A proper domain name (such as www.example.com) - not including any of the subdomains
A domain name with a preceding dot (such as .example.com) - indicating any subdomains (e.g. foo.example.com) but not including the domain itself (example.com)
A single dot (.) - indicating any "one-word" domain names, typically used in an intranet.
A topic name in the format topic:TopicName or topic:WebName.TopicName. The WebName defaults to the base web (%BASEWEB%) in the current context.
If a topic name is specified, the topic is expected to contain a table, where the left-most column is for the domains.