Defines a path name for a relational database (Format 1) or a
       path name for a Oracle CODASYL DBMS database instance (Format 2).

       Format 1

         DEFINE DATABASE  rdb-database-path  ON  root-file-spec;

       Format 2

         DEFINE DATABASE  dbms-database-path

              [USING]  [SUBSCHEMA]  subschema-name

              [OF]  [SCHEMA]  schema-path-name

              ON  root-file-spec;

1  –  Arguments

    rdb-database-path

       Is the Oracle CDD/Repository path name of the relational database
       you want to define. The path name can be either a DMU or a CDO
       style path name.

    root-file-spec

       Is the name of the database root file. For relational databases,
       the default file type is .RDB; for Oracle CODASYL DBMS, the
       default file type is .ROO. A complete file specification has
       the following format:

       node-spec::device:[directory]file-name.type;version

    dbms-database-path

       Is the Oracle CDD/Repository path name you choose for the Oracle
       CODASYL DBMS database instance. The path name can be either a DMU
       or a CDO style path name. Although a DMU style path name is still
       accepted, you are recommended to use a CDO path name.

    subschema-name

       Is the name of a subschema for the specified schema.

    schema-path-name

       Is the CDO path name of a Oracle CODASYL DBMS schema.

    ;(semicolon)

       Ends the DEFINE DATABASE command.

2  –  Examples

       Define a relational database path name:

       DTR> DEFINE DATABASE CDD$TOP.DEPT29.PERSONNEL ON
       DFN>                 DBA2:[D29.DAT]PERSONNEL.RDB;
       DTR>

       Define a Oracle CODASYL DBMS database instance. The Oracle
       CDD/Repository path name of the schema is
       SYS$COMMON:[CDDPLUS]DBMS.PARTS. The name of the subschema is
       PARTSS1, and the root file is DB0:[BULGAKOV]PARTSDB.ROO:

       DTR> DEFINE DATABASE PARTS_DB
       DFN>     USING PARTSS1
       DFN>     OF SYS$COMMON:[CDDPLUS]DBMS.PARTS
       DFN>     ON DB0:[BULGAKOV]PARTSDB.ROO;
       DTR>