Final answer:
A new Case Type in a computer system extends from a predefined base table and inherits its structure and properties.
Step-by-step explanation:
A new Case Type in a computer system often extends from a predefined base table.
For example, in a database management system like MySQL or PostgreSQL, a new Case Type may extend from the ‘case’ table or the ‘issue’ table.
This extension allows the new Case Type to inherit the structure and properties of the base table, while also adding specific fields and functionalities unique to the new Case Type.