When creating a child element / custom area in a Student Register, to be able to include data from other modules (Student Manager / Admissions etc) that has already been completed.
For example, creating a Right to Study register, which includes the Nationality field from Student Manager record for pupils on the Right to Study register and the nationality field is pre-completed with the data completed in Student Manager module.
This would avoid having to duplicate completing and maintaining fields in two different areas of the system.
See also https://ideas.isams.com/ideas/MIS-I-2059