RFCs (“Request for Comments”) are standards documents produced by the Internet Engineering Task Force (IETF).
[RFC-1630] Universal Resource Identifiers in WWW. Network Working Group, Internet Engineering Task Force (IETF), June 1994, http://www.apps.ietf.org/rfc/rfc1630.html.
.[RFC-1736] Functional Recommendations for Internet Resource Locators. Network Working Group, Internet Engineering Task Force (IETF), February 1995, http://www.apps.ietf.org/rfc/rfc1736.html.
[RFC-1737] Functional Requirements for Uniform Resource Names. Network Working Group, Internet Engineering Task Force (IETF), December 1994, http://www.apps.ietf.org/rfc/rfc1737.html.
[RFC-1738] Uniform Resource Locators (URL). Network Working Group, Internet Engineering Task Force (IETF), December 1994, http://www.apps.ietf.org/rfc/rfc1738.html.
.[RFC-3066] Tags for the Identification of Languages. Network Working Group, Internet Engineering Task Force (IETF), December 1994, http://www.apps.ietf.org/rfc/rfc3066.html.