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.

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

The architecture capabilities define the parameters, structures and processes that support the management of the architecture repository.

The architectural landscape is the architectural representation of architectural concepts that have been deployed within the operational enterprise at a certain point in time. The landscape likely exists at multiple levels of abstraction to meet different architectural objectives.

The Standards Information Base (SIB) establishes the standards that new architectures must meet, which may include generic architectural languages and frameworks, industry standards, selected vendor products and services, or shared services already implemented within the organization.

The Governance Log provides an overview of architecture governance activities across the enterprise.

The Reference Library provides guidelines, templates, patterns, and other forms of reference material that can be used to accelerate the creation of new architectures for the enterprise.

The Architecture requirements and requirements collection provides an overview of all authorized architecture requirements and requirements that have been agreed with the stakeholders within the architecture board.

The Solutions Landscape presents an architectural representation of the Projects and SBBs that support the Architectural Landscape and that are planned or implemented by the enterprise. They therefore form the connection between the Baseline and Target architecture.