!! Internal and External Links
Using the pipe symbol instead of a space to separate the link and the description was our preferred choice at [Wikisym 06] because internal links can have spaces.

{{{
[[link]]
[[www|desc]]
[[MyBigPage|go to my page]]
}}}

* [WikiMatrix internal link syntax comparison|http://www.wikimatrix.org/syntax.php?i=138]
* [WikiMatrix external link syntax comparison|http://www.wikimatrix.org/syntax.php?i=139]

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Examples:

Good:
{{{
[[RecentChanges]]
[[recent changes]]
[[recent_changes|See our recent changes]]
[[http://foo.bar/baz|the link description]]
[[mailto:fred@flinstones.org|drop me a note]]
[[http://foo.bar/full_size.png|{{image:http://foo.bar/thumbnail.png}}]]
[[http://foo.bar/full_size.png|{{image:http://foo.bar/thumbnail.png}} click for the large version]]
}}}

Bad:
{{{
[[http://foo.bar/baz the link description]]
}}}
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Also see [All Markup]