R. Fielding. <a href="http://www.ietf.org/rfc/rfc1808.txt"><cite>Relative Uniform Resource Locators.</cite></a> June 1995. Internet RFC 1808. (Obsoleted by RFC 3986) URL: <a href="http://www.ietf.org/rfc/rfc1808.txt">http://www.ietf.org/rfc/rfc1808.txt</a>