E-commerce package diagram
An e-commerce package diagram gives a high-level view of how an application is organized. Packages represent coherent areas such as the storefront, catalog, checkout, orders and payments. Dependency arrows show which package needs services or data from another one. This level of detail is useful in an architecture review because it exposes coupling without filling the page with every class. Add or remove representative classes as the system boundaries become clearer, but keep the diagram focused on package responsibilities.
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Scenario
A software team reviews boundaries in an online store.
Key decisions
- Group by responsibility: Keep UI, catalog, checkout and payment concerns separate.
- Expose dependencies: Show which package calls another.
- Protect payment integration: Isolate the external gateway behind its package.
- Avoid implementation detail: Keep classes as package representatives.
When to reuse this
Use for architecture discussions before drilling into a class or component diagram.
Frequently asked questions
What belongs in a package diagram?
Why use representative classes?
What does a dashed arrow mean?
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