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ArchiMate is a tool used to create diagrams that show how different parts of a business work together. It is used to model things like business processes, software systems, and infrastructure. ArchiMate uses symbols to show how these parts are connected and how they depend on each other.

ArchiMate is designed to help people understand complex IT and business environments. It uses a language that is easy to understand and stays consistent across different diagrams. 

ArchiMate diagrams are divided into different categories like business, data, applications, and technology. This helps people to see how different parts of a business fit together. It is often used by people who work in IT or business management.