Re: [webpayments] [Architecture] Payment App is a term used in EMV to describe the applet stored in SC (#31)

@adrianhopebailie 

Your comment above: "In this architecture a payment method is the protocol that is used between payment app and payee to exchange payment data. "

Does not seem to align with the architecture document, which defines payment method as: "A way of paying. A system and set of rules for payments."

I have understood payment method to be the things you say for X in the phrase "At this shop we accept X ". That would include things like "Visa" and "PayPal" and "Samsung Pay". I believe users, merchants, and payment system providers care a lot about visibility of those brands. (I think adding examples to the architecture document (as we've discussed) will help build shared understanding.)

While I am reluctant to do this, here are some terms to consider:

 * Payment agent: A piece of software that enables a payer to make payments 
   (usually provided by the payer's PSP). A payment agent is not required to have a user
   interface; one that does is called a Payment App. A payment agent may
   support multiple payment methods.

 * Payment method:  A system and set of rules for payments. 
   Examples: Visa, MasterCard, Bitcoin, Ripple, PayPal, Google Pay, Alipay, Yandex money.

 * Payment mediator: A software agent that coordinates the flow of messages between 
    a payee’s application and the payer’s payment agents.

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/webpayments/issues/31#issuecomment-163355064