A straight forward document specifying dhcpv6 options, had little trouble reading it. Got a bit lost with acronyms though, i.e. forgetting what ORO is when nearing the end of the document. Any reason why DNS over HTTP (DoH, RFC 8484) isn't standardized in the same document? A Nit (maybe): in section 4.2: "... defined by standard." -> "... defined by standard action" ?