A conceptual structure used to plan, develop, implement, govern, and sustain an architecture.

The Architecture metamodel describes the organization-tailored application of an architecture framework, including a metamodel for architecture content and language.

The Architecture Repository is a software tool that stores key architectural inputs and outputs, including Architectures themselves, their constituent elements, standards, references, principles and the Governance Register. Regardless of the Architecture Framework or Architecture Language selected. An enterprise architecture repository is therefore a collection of artifacts that describes the current and intended enterprise landscape of an organization. The purpose of the enterprise architecture repository is to represent the organization's inventory of technology, data, applications, and business artifacts and to show the relationships among these components. This is achieved by creating diagrams and visualizations based on the contents of the architecture repository.

Description of the structure of the organization based on business roles and/or actors. Often based on an existing enterprise architecture framework.