Explore Alexandria · Optio Alexandria

Logical payment: 3 direct relations. Dashed: named, not defined yet

Notes

Explore Alexandria 1 of 6

Illustrative payment system · authored sample knowledge

Follow the payment use case through the real project views. Select a step, a part or its supporting context.

Connect a business outcome to the parts responsible for it.

One business payment operation, pay-1001. Retrying its network request does not inherently create a new payment.

An unanswered request retains its logical identity; a new explicit attempt after a confirmed decline is a different operation.

Logical payment One business payment operation, pay-1001. Retrying its network request does not inherently create a new payment.
Order The merchant request to buy Mira’s €100 lamp, represented only by the payment-facing reference ord-1042.
Processor confirmation Authored evidence about one payment or refund operation. Event identity and compatible state determine how it can affect recorded knowledge.
Refund A separate operation that references an existing payment. refund-1001 requests the full fictional EUR 10000.