[1] XRI Resolution 2.0 (2008-03-11 07:46:14 +09:00 版) http://docs.oasis-open.org/xri/2.0/specs/xri-resolution-V2.0.html

[2] RFC 2169 - A Trivial Convention for using HTTP in URN Resolution (2017-04-24 00:22:00 +09:00) https://tools.ietf.org/html/rfc2169#page-7

[3] RFC 2483 - URI Resolution Services Necessary for URN Resolution (2017-04-16 16:20:23 +09:00) https://tools.ietf.org/html/rfc2483#section-5