1.3 What goes into a File Definition?

Before explaining what goes into a file definition, it is important that you understand the concept of a LANSA file definition and how this relates to the IBM i concept of a file definition.

A 'file' is a normal IBM i database file, in which records can be retrieved, added, changed or deleted.

To create a file, LANSA uses a file definition. In IBM I terms, a file definition contains:

• the fields that make up the format of the physical file records

• logical views of the file. (These may contain select/omit criteria.)

LANSA's file definitions include:

• physical files for tables

• logical views.

As well, the LANSA file definition can also contain a number of LANSA file features, such as:

• validation rules

• triggers (Rules and triggers can be recorded at both field and file level.)

• virtual fields

• batch control logic

• access routes.

For more details about LANSA file definitions refer to the section What is a File and What is a File Definition? in the LANSA for i User Guide.