They may be open formats, but you can't just throw Microdata and JSON-LD into an email and expect Gmail to display your actions. You have to register with Googl

They may be open formats, but you can't just throw Microdata and JSON-LD into an email and expect Gmail to display your actions. You have to register with Google: https://developers.google.com/gmail/schemas/registering-with-google https://developers.google.com/gmail/schemas/registering-with...