Hi All,

I am writing to seek guidance on the handling of*ROID (Repository Object IDentifier)*in RDAP implementations for registrars together with*thin registry models*(where registrars hold domain/contact/host data). Our organization acts as a registrar and is working to comply with the RDAP profile outlined in RFC 7483 and related 2019 updates.


     *Context*

 *

   We operate in a thin registry environment where the registry
   delegates RDAP queries to registrars.

 *

   Our implementation uses*registrar-generated identifiers*(not ROIDs),
   as the registry does not assign or store ROIDs.

 *

   During RDAP testing, we encountered errors such as/“globally unique
   identifier not registered in EPPROID”/, suggesting a mismatch
   between our identifiers and ROID expectations.


     *Questions*



     ****

1.

   RFC 7483 §10.2.4 mentions|roid|as optional. For registrars in thin
   models:

2.


3.

   Is it acceptable to use*registrar-generated handles*(e.g., UUIDs)
   instead of ROIDs in RDAP responses?

4.


     *

       Are there best practices for mapping internal registrar IDs to
       RDAP|handle|or|roid|fields?

     *


       **

     *

       Did the 2019 discussions formalize any extensions (e.g., custom
       JSON fields) for registrars to bypass ROID requirements?

     *


     *

       How do we resolve errors like/“identifier not registered in
       EPPROID”/if ROIDs are registry-managed but unavailable to
       registrars?

         o




Thank you for your insights.


Ciao
Marco


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