DEC DATATRIEVE provides a series of sample definitions for you to
       practice with as you are learning DEC DATATRIEVE. Many of these
       sample definitions are used in the examples in the DEC DATATRIEVE
       documentation set.

       DEC DATATRIEVE provides the NEWUSER.COM program which lets you
       store these definitions and their accompanying data files in a
       specific area of your system. NEWUSER stores the definitions in
       a Oracle CDD/Repository directory that it creates for you. It
       stores the data files (file type .DAT) in the OpenVMS directory
       to which you have set default.

       The location of these files is important in the efficient use
       of DEC DATATRIEVE. Unless your domain definition specifically
       identifies the OpenVMS directory in which the data file is
       stored, DEC DATATRIEVE looks in your default OpenVMS directory
       for the data files it needs to perform various operations. To
       use the sample definitions correctly, you should always set your
       OpenVMS default directory to the directory in which you have
       stored your sample data files; otherwise, when you ready one of
       the sample domains, you may get an error message, such as the one
       in the following example:

       DTR> READY YACHTS
       File not found - "YACHTS.DAT".
       DTR>

       If you get such an error, you should exit DEC DATATRIEVE and set
       your default OpenVMS directory to the directory that contains the
       sample data files and then reinvoke DEC DATATRIEVE.

       A number of the sample definitions are also stored in
       CDD$TOP.DTR$LIB.DEMO upon installation of DEC DATATRIEVE. These
       definitions are for read-only purposes. You should not attempt
       to edit these definitions. Use the sample definitions and sample
       data files provided by NEWUSER.COM for your practice exercises.

       If you also use Oracle CODASYL DBMS and Oracle Rdb, DEC
       DATATRIEVE provides some DEC DATATRIEVE-specific sample
       definitions for these products. These are stored in
       dictionary directories subordinate to CDD$TOP.DTR$LIB.DEMO:
       CDD$TOP.DTR$LIB.DEMO.RDB and CDD$TOP.DTR$LIB.DEMO.DBMS.