A format describes the structure of the data in a data file.
Before you can import records from a data file into an IBM® Informix® database or export records from a database to a data file, you must define a format that describes the data file. You do not need to define a format for the database because ipload already knows the schema (the organization) of the database table.
After you familiarize yourself with the concepts in this section, you might save yourself some work by using one of the Generate options to create formats automatically.