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

The Definitive Media Library (DML) is the designated controlled environment within ITIL's Configuration Management process where only approved, quality-checked versions of software and media CIs are stored. It ensures that only verified and licensed copies are used in the IT environment, supporting both integrity and auditability. The DML is a critical control in Software Asset Management and Change Management processes.

Definitive Software Store is not a recognized ITIL term and does not correspond to any defined repository within the ITIL configuration management framework.

The Service Knowledge Management System (SKMS) is a broad repository for all service-related knowledge and data, and is not a specialized secure store for media Configuration Items.

Software Secure Library is not an ITIL-defined term and has no formal role within the ITIL configuration or asset management processes.