From Joomla! Documentation

This is a documentation subpage for Template:Srlink.
It contains usage information, categories and other content that is not part of the original template page.
To view the template page itself, see Template:Srlink.

This template can be used to easily externalise cross-namespace links from article space. Project:Self-references to avoid explains why these are undesirable and break on Joomla! Documentation mirrors; {{srlink|Main Page}} displays as Template:Srlink rather than Main Page but remains intact even on mirrors. {{srlink|Main Page|Joomla! Documentation's Main Page}} shows that piping links are allowed: Template:Srlink.

For the opposit of {{srlink}} see {{selfref}}.