Encoding(s) are not mandated today. [RFC 8639](https://tools.ietf.org/html/rfc8639) defers it to transport specific drafts, such as this one. Since they are not mandated, the choices are: - pick one encoding - publisher supports both JSON and XML - receiver supports both JSON and XML
Encoding(s) are not mandated today. RFC 8639 defers it to transport specific drafts, such as this one.
Since they are not mandated, the choices are: