[browser-payment-api] How do organizations layer additional information in the core payment messages? (#40)

Migrated from https://github.com/w3c/webpayments/issues/18:

Are the core set of payment messages extensible?

If they are extensible, what is the extensibility mechanism?

Is the browser required to understand this extensibility mechanism?

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/browser-payment-api/issues/40