Bibliographic pointers with an empty @target

All the following should produce the same thing:

Bibliographic pointers with an empty @target

Bibliographic references with a non-empty bib pointer

If the ptr or ref is non-empty, we display its contents instead of the usual author+year. But we only do that if @rend="default". hello hello hello hello hello hello hello hello hello hello hello hello

References to an entry that is not present in the /div[@type='bibliography']. Links should point to the project-wide bibliography.