
Default directory for databases.
It contains initially:
- the main example databases used in the integrated guides and tutorials (xxxx.db):
  - CLICOM.db: CLIENT-COMMANDE-DETAIL-PRODUIT
    schema and data in French
  - ORDERS.db: CUSTOMER_CUSTORDER-DETAIL-PRODUCT
    translation of "CLICOM.db" in English; 
  - PERSONNES.db: hierarchy of persons (cyclic data structures)
    Language insensitive.
  - COMPOSITION: bill of material (cyclic data structures)
    Language insensitive.
- the SQL-DDL code of these databases (xxxx.ddl).
- the "SourceDB.zip" archive containing the original versions of these files.

In use, this directory will also contain:
- various other databases
- the companion files of the databases:
  - backups (xxxx.db.bak), automaticalle generated in "Basic" mode.
  - last graphic positions of the data windows (xxxx.geo).

Only the databases should be preserved. All other files can be deleted
and are regenerated automatically when needed.
