/usr/share/kamailio/db_berkeley/kamailio/domainpolicy is in kamailio-berkeley-modules 4.3.4-1.1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | METADATA_COLUMNS
id(int) rule(str) type(str) att(str) val(str) description(str)
METADATA_KEY
1 2
METADATA_READONLY
0
METADATA_LOGFLAGS
0
METADATA_DEFAULTS
NIL|NIL|NIL|NIL|NIL|NIL
|