[answer] in the business sequence diagram of XX shopping mall, is it drawn as a business executor (bank) or a business entity (banking system)

a 2019-3-27 16:54:

Mr. Pan , The secondary performer in the business use case diagram is the bank , Then it's time to XX In the business sequence diagram of the shopping mall , It is depicted as a business executive （ Bank ）, Or business entities （ The banking system ）？

UMLChina Pan Jiayu ：

If judged , The improvements we need to make do not affect the specific interaction with the bank , The message points to the secondary performer " Bank " that will do . If affected , Draw the specific interaction mode , And then there will be " The banking system ". This business entity can be regarded as a common part of shopping malls and banks .