What components does system architecture documentation cover?

System architecture documentation typically includes the following components:

• System overview — goals, purpose, main functions.
• Architectural decisions — chosen patterns, technologies, rationale for choices.
• System components — description of modules, services, their interactions.
• Diagrams — structural (e.g., component diagrams, class diagrams), behavioral (sequences, states).
• Interfaces and communication protocols — APIs, data formats.
• Performance and security requirements — constraints and criteria.
• Deployment — environment description, infrastructure, configuration.

This set helps understand how the system is structured and serves as a basis for development and support.