Where should the definitive authorized versions of all media Configuration Items (CIs) be stored and protected?

The Definitive Media Library (DML) is a formally defined ITIL concept within Service Asset and Configuration Management (SACM) that serves as the single secure repository for all authorized master copies of software and media CIs. It ensures that only approved, verified versions are used in deployments, changes, and recovery scenarios, preventing unauthorized or corrupted versions from entering the live environment.

Definitive Software Store is not a recognized ITIL term - the correct and official terminology is Definitive Media Library.

The Service Knowledge Management System (SKMS) is a broad knowledge repository covering all service management data and information, not a secure storage location specifically for media CIs.

Software Secure Library is not a defined ITIL concept and does not appear in the ITIL framework or glossary.