!!! Overview
[{$pagename}] is a [URI] component when refers to a [URI] that is, aside from its [URI Fragment Identifiers] component (if any), identical to the base [URI] (Section 5.1), that reference is called a [{$pagename}].  

The most frequent [examples] of [{$pagename}] are relative references that are empty or include only the number sign ("#") separator followed by a [URI Fragment Identifier].

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]