The plugin allows to resolve @ref links that fail resolution to fall back to @extref links. Any fallback must be declared explicitly, since the proper @extref link cannot generally be inferred from the @ref link. Even in situations where it could: the fallback should be used very very sparingly, and in no way substitutes @extref links (unlike how Intersphinx handles things).
The plugin allows to resolve
@reflinks that fail resolution to fall back to@extreflinks. Any fallback must be declared explicitly, since the proper@extreflink cannot generally be inferred from the@reflink. Even in situations where it could: the fallback should be used very very sparingly, and in no way substitutes@extreflinks (unlike how Intersphinx handles things).