Catalogue format

The catalogues in DIRA2 are organized in tables of data. The files on tape are arranged on "ANSI Labelled Magnetic Tape " The catalogues on disk are formatted ASCII files.

The records of a catalogue must have the same length on Unix systems, while can be of variable or fixed length form on VAX/VMS machines; the latter form is strongly recommended. On the VAX/VMS systems the users can transform catalogues from variable record structure to fixed length structure and vice versa by DB_FIXA and DB_UNFIX commands.

Properties of the DIRA2 catalogues are:

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