VAX CDD/Plus

This manual introduces VAX CDD/Plus, a data dictionary system for creating, maintaining, and analyzing data descriptions (metadata). It supports two distinct dictionary formats: CDO (Common Dictionary Operator) and DMU (Dictionary Management Utility).

Key features of CDD/Plus for CDO dictionaries include:

• Easy-to-use interface: A single, menu-driven CDO utility for all data definition, administration, and management functions, which can also read DMU dictionaries.
• Distributed access: Dictionaries can be located across various devices and networks, accessible as a single logical entity.
• Field-level data descriptions: Supports granular data definitions, enabling sharing, reducing redundancy, and providing "pieces tracking" to identify dependencies and manage changes.
• Relationships: Automatically creates and manages relationships between CDO definitions, including across networks.
• Security and integrity: Implements protection provisions consistent with VMS and Rdb/VMS, alongside automatic journaling for dictionary recovery.
• Call interface: Allows direct programmatic access to CDO dictionaries.

The system also maintains compatibility with older DMU dictionaries, offering utilities (DMU, CDDL, CDDV) for their manipulation and providing a translation utility to read DMU definitions from the CDO interface. The manual is designed for data administrators, system managers, programming supervisors, and programmers.