- You can suggest new messages as addition to existing Message Registries. We welcome any additions to the standard registries (especially Base) that describe common industry conditions that can be reported. - You can contribute an entire new registry that covers a topic we haven't covered yet.
Or, if you have one completed that you just want to make available, you can have it re-published by the DMTF in our repository (as you show above).
As long as the messages aren't specific to your product or implementation (meaning - they could apply to other products as well), we'd much prefer that the message get added to the standard Registries to further improve interoperability in the industry.