Customer Defined Fields (CDFs) can be added to tables, screens, reports and BODs and validation and calculation logic can be defined around those fields.
Use the CDF concept to store additional data in the standard Infor LN tables. The CDF definitions are stored separately from the table definitions in the Data Dictionary. For the end user, the CDFs behave in the same way as the standard fields, if defaulting, validations, etc. are built using the CDF logic of the table extension point. The session extension point also has features for the CDFs.
CDFs are configured per package combination. This implies that when moving your companies from one package combination to another, the CDF definitions must be present in the target package combination. Otherwise you lose the data in the CDFs.