Each HEPDB database file contains two special directories, which are created automatically. Thu our initial database file structure is as shown below.
Initial directory structure
\index{Initial directory structure}
CDGE
|
|----->HELP
|----->DICTIONARY
Note that the top (root) directory name not actually part of the
database itself. However, files accessed though HEPDB
always have a top directory name formed by concatenating
the letters CD with the two character database prefix.