Links that may be overwritten (known exceptions) should be overwritten at deep paths.
Links that may be overwritten (known exceptions) should be overwritten at deep paths.

Without this, addressing @graph,1,instanceOf,language with a replace rule would
have been ok (instanceOf,language may be replaced even if linked), but
addressing @graph,1,instanceOf,language,theoretical_nonexistant_property would
have been disqualified, because the "exception" was only looking at the tail
of the path (a bug). Now it scans the whole path looking for the exception pattern.

libris/librisxl,libris/librisxl,libris/librisxl