C4 model

Buildings have specific floor plans, site plans, etc. There is no standard for software architecture. C4 tries to solve this.

It uses the following levels of abstraction (top down):

• Context (Software system): e.g. banking system etc

• Containers: e.g. webapps, databases, file systems, shell scripts etc

• Components: e.g. collection of implementation classes

• Code: e.g. classes, interfaces, objects, functions etc

In a nutshell (from c4model.com):

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• Tag: documentation