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The file control component of LANSA works with file definitions.

It is important that the concept of a file definition and how it relates to the IBM i concept of a file be understood before attempting to use the file control components of LANSA.

A file is a normal IBM i database file in which records can be retrieved, added, changed or deleted. A file may be a physical file or a logical view / file.

To create a file LANSA uses a file definition.

In IBM i terms a file definition contains:

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• The file definition name and actual physical file name are always the same. When LANSA requests that the name of a file definition be supplied, specify the name of the physical file (as opposed to the name of any associated logical views/ files).
• The preceding point applies particularly when adding or amending logical views / files. When the option to "Review or change a file definition" is chosen from the file control menu, LANSA will request that the name of the file definition to be review / change be specified. Specify the name of the physical file (which is always the same as the file definition) rather than the name of the logical view / file. Once the correct file definition has been chosen options on the file definition menu allow the addition, review or change of the associated logical files.
• To emphasize these two preceding items again. Within the LANSA system logical views / files are considered to be part of the file definition. The file definition contains the attributes of the associated physical file and all associated logical views / files. The file definition name and the associated physical file name are one and the same.

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