+has 'format', is => 'ro';
+has 'inner_format', is => 'ro', default => 'XML';
+has 'allow_upgrade', is => 'ro', default => 1;
+has 'randomize_seeds', is => 'ro', default => 1;
+
+=method min_version
+
+ $min_version = File::KDBX::Dumper->min_version;
+
+Get the minimum KDBX file version supported, which is 3.0 or C<0x00030000> as
+it is encoded.
+
+To generate older KDBX files unsupported by this module, try L<File::KeePass>.
+
+=cut
+
+sub min_version { KDBX_VERSION_OLDEST }