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Alias 


   The name of a work area; an alternate name given to a database file.
   Aliases are often used to give database files descriptive names and
   are assigned when the database file is opened.  If no alias is
   specified when the database file is USEd, the name of the database
   file becomes the alias.

   An alias can be used to reference both fields and expressions
   (including user-defined functions).  For example:

      ? Invoices->Cust_num       && Reference a field.
      ? Invoices->(FOUND())      && Reference an expression.