Maybe you could but some query/response examples in your draft of how a client 
is suppose to handle backwards incompatibility.... both for a client that 
supports this versioning extension and one that does not. That would probably 
help demystify this for those of us in disagreement.

-andy, no hats

On 09-06-2026 10:07 AM, Gould, James wrote:
Andy,

It's not a requirement for the client to use the /help to get additional 
versioning data, but a feature that a client can opt to use.  The extension 
identifier is not a good versioning signal and leveraging the extensibility of 
RDAP to provide that versioning information is an option and not a mandate for 
interoperability.  We could add additional opaque versioning information to the 
/help, such as opaque version relationships, to further help with those 
extensions that choose to use opaque versioning instead of point versioning.  
Do you see a benefit in working on this?  This meta-data is not required but 
helpful to client implementations and for troubleshooting.

Thanks,


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