Whats the issue or problem you are trying to solve?:
At English Wikisource there are some works which have a list of footnotes together as an external section.
Example work: https://en.wikisource.org/wiki/Index:Impeachment_of_Donald_J._Trump,_President_of_the_United_States_%E2%80%94_Report_of_the_Committee_on_the_Judiciary,_House_of_Representatives.pdf
A sample page being :- https://en.wikisource.org/wiki/Page:Impeachment_of_Donald_J._Trump,_President_of_the_United_States_%E2%80%94_Report_of_the_Committee_on_the_Judiciary,_House_of_Representatives.pdf/401
The citations/footnotes are on an external page or pages later in the work.
Currently these are implemented using a special template :- https://en.wikisource.org/wiki/Template:Authority_reference
and some "section" syntax in the footnotes section, Whilst adequate for most situations it still requires some additional syntax specific to Wikisource. There is also an overhead in repeatedly calling a template (although this would also to some extent still exist if calling into an extension.)
What is the feature or fix you would like :-
- A mechanism for transcluding a citation or footnote on (or present in) an external page or page(s) (initially on the same wiki).
- A suitable syntax for the REF tag to support that mechanism (1.) without the need for an additional template.
- An appropriate error message and exception handling for non-existent pages and absent references if specified in that syntax (2.).
I appreciate that this is a long-term request, and may not be technically feasible for a while.