Where are the details of core and enhancing service provided?

The definitive media library (DML) is a secure repository for authorized software media versions, not a source of service descriptions for customers.

The configuration management system stores data about configuration items and their relationships, not service-level details intended for customer consumption.

The service portfolio covers all services across their full lifecycle - including pipeline and retired services - whereas the service catalogue specifically documents live services with core and enhancing detail.

The service catalogue documents all live IT services, including core services (the fundamental outcomes delivered to customers) and enhancing services (additional features that add value beyond the core). It is the authoritative reference customers and users consult to understand what services are available, their characteristics, and how to request them.