Re: [webpayments] How do organizations layer additional information in the core messages? (#18)

> If we have a core set of payment messages, are they extensible?

Yes, developers should be able to encapsulate arbitrary information into the core payment messages.

> If they are extensible, what is the extensibility mechanism?

Linked Data should be the extensibility mechanism. Specifically, JSON-LD.

> Is the browser required to understand this extensibility mechanism?

No, the browser (nor most developers) need to understand the extensibility mechanism. However, there does need to be one and JSON-LD provides a mechanism that looks a great deal like JSON w/o having the extensibility issues that JSON has.

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https://github.com/w3c/webpayments/issues/18#issuecomment-161177904