See FootNotes

== Examples ==
 * {{{[[FootNote(HelloWorld)]]}}}
 * {{{[[FootNote([1])]]}}}: could be replaced with {{{[1]}}} ?
 * {{{[[FootNote([tag] blah blah WikiName)]]}}}
 * {{{[[FootNote(** blah blah blah)]]}}}
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CategoryMacro

[[FootNote(** blah blah blah)]]