I compared zathura with xpdf:

• xpdf can follow links to same or other PDFs
• zathura does NOT follow links to same or other PDFs

To reproduce:

• a.rst

.. _`targetid`:

:target: goes here

See |targetid|.

.. |targetid| replace:: `target <a.pdf#targetid>`__

EOF

• make pdf

    pandoc --standalone -f rst -t latex a.rst -o a.pdf

• start zathura

    zathura a.pdf

• F1 shows

    file://a.pdf#targetid

but expected:

    file:///a.pdf#targetid

• f1 opens an empty zathura. Expected: jump to the target location.

Zathura should evaluate the URI before calling xdg-open:

• split at #
• remove file://
• make absolute directory

If the file is the currently open file,

• zathura should jump to the location.

If the file is different,

• zathura should call xdg-open, but with 3 slashes in the file URL.