/usr/share/doc/pd-pdp/examples is in pd-pdp 1:0.14.1+darcs20180201-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/pd-pdp/../../../lib/pd/extra/pdp/examples
/usr/share/doc/pd-pdp/../../../lib/pd/extra/pdp/examples