/usr/share/metview/etc/EcfsDef is in metview-data 4.8.0-4.
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 11 12 | ECFS 
{
	ECFS_DOMAIN
	{
		@
	} = ec:
	FILE_NAME 
	{
		@ 
	}
}
 |