I have a growing number of REST services that talk to each other with JSON. Right now, the communication is direct, but it's possible that a broker might process and distribute later on.
This is the only one I've found so far: https://github.com/cjus/umf/blob/master/umf.md
Are there others that would be better suited? Thanks.
You can use JSON Schema. There is more explanatory info available also.