Creating/Defining Your Data Model › Defining Your Data Model › Redirection

Redirection

Normal resolution of a CA 2E relation causes one or more fields to be added as entries to a file. You can override this resolution by redirecting a relation entry. Redirecting means that you specify that the source of a field value, needed to implement an instance of the relation, is to be supplied from another field of the same type already present on the file.

A source field may itself be either a virtual or non-virtual field. Advantages are as follows:

• There is less need to carry redundant fields on a record purely for the purpose of supplying keys to access another file.
• You can specify redirection of key fields to other instances of the same (base) field on a record.