Hi Mario,

inline...

On 7/7/26 6:42 AM, Mario Loffredo wrote:
> Hi,
> 
> Section 5.4 cites MNOT-VERSIONING and lists two general principles for 
> versioning RDAP extensions. I suggest adding a third principle that captures 
> the granularity aspect of the referenced guidance:
> 
>    *  The impact of a change should be limited to the RDAP extension feature, 
> protocol element, or resource whose semantics are being
>       changed; unrelated features of the same RDAP extension should not be 
> versioned or replaced solely because of that change.


Can this be reworded to "Changes should be kept to a minimum and to only the 
protocol elements necessary to affected the needed change." ?

> 
> AFAIU, MNOT-VERSIONING argues against applying versioning to a whole web API 
> surface when the actual change is local. It notes that putting a version 
> identifier into a URI causes even minor changes to mint an entire new set of 
> resources, with consequences for caches, links, and deployed clients. It also 
> gives a more granular example: 
> 
> "/rather than bumping a version when you want to modify how a resource 
> handles query parameters, you mint a new, sibling resource with a different 
> name that takes the alternate query parameters./"

Another good example for 5.4.3.2.

> 
> I believe this principle is especially relevant to RDAP extensions, because 
> Section 5.4 already defines compatibility in terms of specific protocol 
> elements, such as JSON names and values, query paths and parameters, and 
> other. 
> 
> Therefore, the draft should make clear that the impact of a change ought to 
> be limited to the affected extension feature, and should not unnecessarily 
> force unrelated features of the extension to be versioned or replaced.

That speaks to the need for the overlapping extension as described in 5.4.3.2.

As an aside, I think we got the terminology wrong. We should use "superseder" 
instead of "replacement" because the successor may be complementing rather 
replacing. And as with a revision, you actually don't know when something is no 
longer used.

> 
> 
> Also, here are two small typos:
> 
> 1)  Add commas to separate the values of the array below:
> 
>          "description":
>          [
>            "Query the database."
>            "JSON replaces the Whois."
>            "Structured data flows."
>          ]
>        
> 
> 2)  Add a closing curly brace as shown below
> 
>    {
>      "rdapConformance": [
>        "rdap_level_0",
>        "exampleExt"
>      ],
>      "exampleExt_authorSearchResult": [
>        {
>          "objectClassName": "exampleExt_author",
>          "author":
>          {
>            "firstInitial": "R",
>            "lastName": "SomePerson"
>          }
>        },
>        {
>          "objectClassName": "exampleExt_author",
>          "author":
>          {
>            "firstInitial": "J",
>            "lastName": "SomePerson"
>          }
> 
>          <=== put a closing curly bracket here
>        ]
>      ]
>    }
> 

I noted this in the issue tracker. Thanks.

-andy

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