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Posts · July 2026

Regarding diagrams

By Alejandro Rodríguez López·15 July 2026 ·1 min read

demo

Mermaid diagrams are very useful tools, not only on software design, also on websites, where they can be rendered and seen quickly to provide a first initial idea or a deeper understanding of things.

erDiagram


    EMPLOYEE {
        SERIAL id
        INTEGER employee_id
        VARCHAR name
    }


    WORK_LOCATION {
        SERIAL id
        VARCHAR code
        VARCHAR address
    }


    EMPLOYEE }|--|| WORK_LOCATION : ""

That should be it! You can even do C4:

C4Container


    title System


    Enterprise_Boundary(ebo0, "SYSTEM") {


        Person(user, "User", "System User")


        System_Boundary(system, "PROGRAM_SYSTEM") {


            System(front, "FRONTEND")


            System(back, "BACKEND")


            SystemDb(db, "DBMS", "Database")


        }


        Rel(user, front, "")


        Rel(front, back, "HTTP")


        Rel(back, db, "HTTP")


    }