Re: [webpayments] How should the message schemas for the payment request and response be defined? (#27)

I will try to get some more detailed statistics published from Google, but as a first approximation I think I can reasonably share that we are seeing JSON-LD on several million sites. Prior to https://googlewebmastercentral.blogspot.co.uk/2014/09/improved-sitelinks-search-box.html it was relatively obscure, except for use in email e.g. see https://developers.google.com/schemas/formats/json-ld . Since JSON-LD only became a W3C Recommendation in January 2014 this is pretty healthy adoption.

I should also mention that while JSON-LD is increasingly favoured as a preferred syntax (over microdata/rdfa) for many Google features/products, there are some for which Microdata continues to be the preferred format. Since schema.org is defined in a syntax-neutral manner this is a relatively minor complication. 

See also https://developers.google.com/structured-data/ -> https://developers.google.com/structured-data/rich-snippets/products -> https://support.google.com/merchants/answer/6069143?hl=en

danbri@google.com

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https://github.com/w3c/webpayments/issues/27#issuecomment-179207196