What documentation exists to explain TheVolumeSettingsFolder on OS X?

Question

looris@Palace-of-the-Nine-Moons:/tmp $ tree /TheVolumeSettingsFolder/
/TheVolumeSettingsFolder/
└── HFSExtentTables
    └── OVDBHDR4R6PVQJPJRE6QTLCBNS
        ├── 8PHMGCTSVNFUN915KNSCRDST3K
        └── UBNUIHU3QNGCTMAO8ECAQ65960

2 directories, 2 files

What is this?

Searching google I only found uninformed crap.

The two files are binary data (file just says "data" and strings returns nothing useful).

If they are, as the name would imply, actually "volume settings", how can I know which volume they refer to?