In the TOGAF framework, the architecture domains considered as subsets of an overall enterprise architecture are Business, Technology, Application, and Data. Here’s a detailed explanation:

TOGAF Architecture Domains:

Business Architecture: Describes the business strategy, governance, organization, and key business processes.

Data Architecture: Defines the structure of an organization’s logical and physical data assets and data management resources.

Application Architecture: Provides a blueprint for the individual applications to be deployed, their interactions, and their relationships to the core business processes of the organization.

Technology Architecture: Describes the logical software and hardware capabilities that are required to support the deployment of business, data, and application services.

Importance of Each Domain:

Business Architecture: Aligns the architecture with the business strategy and goals.

Data Architecture: Ensures that data is structured and managed to support business processes and decisions.

Application Architecture: Ensures that applications are designed and integrated to support business processes.

Technology Architecture: Provides the technology infrastructure needed to support applications and data management.

TOGAF References:

Phase B: Business Architecture: Focuses on developing the Business Architecture.

Phase C: Information Systems Architectures: This phase includes both Data Architecture and Application Architecture.

Phase D: Technology Architecture: Focuses on developing the Technology Architecture.

In summary, the TOGAF standard considers Business, Technology, Application, and Data as the architecture domains that are subsets of an overall enterprise architecture.