Template:SUBJECTNAME/core
Subject:{{{namespace}}}:{{{basename}}}
This subtemplate of {{SUBJECTNAME}} does the actual deduction of the associated subject-page name, using data provided by the parent template.
Usage
The two parameters expected are namespace and basename.
Internals
If the basename has prefix Subject:, nothing else is looked at. Otherwise, non-content pages lose their namespace prefix while content pages, consistent with the behavior of {{BOOKNAME}}, retain their namespace prefix.