ALEPH file types

There are several ALEPH file types:

NATIVE

machine-dependent input/output (RAW data are written in VAX NATIVE format)

EPIO

machine-independent input/output (all official ALEPH datasets other than RAW data)

EDIR

event directories (for fast access to data using the CLAS data card)

DAF

direct access files (e.g., ADBSCONS database)

CARDS

card image files (e.g., ALPHA data cards)

HIS

histogram files (machine-dependent HBOOK format)

EXCH

histogram files (machine-independent HBOOK format)

The ALEPH file type cannot be recognized automatically. The file type should be given as the extension part of the data set name.

Examples:

On DEC/VMS computers:

 MYFILE.EPIO

On UNIX:

 myfile.epio

ALPHA uses the data set name to determine the format. For file names which do not follow this convention, see the following section.