MIL-STD-31000B : DOD Standard Practice Techincal Data Packages
A set of technical data which is the controlling source for any subsequent technical data output. All changes to the technical data must originate on the master technical dataset. There can be only one instance of the master technical data which is typically in the native CAD format and maintained by the current design activity.
See Also:
Technical Data, Native CAD Data, Current Design Activity