Hello, I've reviewed draft-ietf-weirds-rdap-query-15 for its operational impact. Summary: The document is well written, thorough, provides ample discussion and examples, and even provides a change log in it's appendix. I have no objections to this document and believe it should be published There are 2 nits from the nits checker for down refs. Overall, I found the document very easy to read through, walking through the problem it's trying to solve, addressing each add section by section, with discussion points for each, and examples for each, too. One minor (personal) nit, is the requirement that WHOIS servers that don't or can't respond to a request SHOULD return a 501 error (RFC7231). In trying to provide some structure, it'd be nice to know explicitly that the server has/had an issue responding to the request. If the server chooses not to return a 501 in the event of an error, then what? This aside, the document is ready for publication. Kind regards, Sarah