For values of supportedNetworks, propose managing those outside the specification (as the list may be more dynamic than the specification) and linking to that list from the specification.
Should Manifest spec be included as part of the PMI spec?
Question: Hard code path to manifest or something else (e.g., content negotiation).
Any optimization desirable for the case where someone wants to say "I have a URL for my payment method and want to allow any payment app to implement it; but don't want to host a manifest file."
Who would like to work with Nick and Ian on updated communications around the benefits (to merchants (and merchant service providers)) of the payments APIs?