Use Case #3. Thin client cash register
You have a POS working in a browser. Or very simple online POS inside mobile device. And you need a storage for your data and processing for your receipts.
To fetch taxes, categories, products and commodities see Use Case #1. Simple Articles consumer.
Fiscal operations are presented in this table:
to withdraw and deposit
to make sure thin client has the top latest version of articles
to make sure this cashier does not get in conflict with another cashier
to make a sale
to get a receipt
to confirm the receipt is printed
to close the day
to get days
to get an X-/Z-report