Well, I think I can find these tables via 'file' command line.
Just need to go further! 

    $ file -k , --keep-going don't stop at the first match

> ~$ file -k place.db
place.db: Berkeley DB (Btree, version 9, native byte-order)\012- Berkeley DB (Btree, version 9, little-endian)\012- PCX ver. 2.5 image data

> ~$ file -k citation.db
citation.db: Berkeley DB (Btree, version 9, native byte-order)\012- Berkeley DB (Btree, version 9, little-endian)

There is a magic module for python. Maybe it makes sense to start (or modify[1]) a script for checking that?
eg, python /usr/share/doc/python-magic/examples/example.py

[1] https://intrepidusgroup.com/insight/2008/09/slithering-along-a-file-with-python


Le lun. 7 avril 2014 at 20:51, Jerome <romjerome@yahoo.fr> a écrit :
I did not find any answer for the cause of the PCX detection around some on my DB tables. Family Trees still work fine, and 'detected tables' are not the same according to the Family Tree!
[snip]

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