For more information on URLs, refer to:

http://www.w3.org/Addressing/

The W3C web page about naming and addressing URIs and URLs.

http://www.ietf.org/rfc/rfc1738

RFC 1738, "Uniform Resource Locators (URL)," by T. Berners-Lee, L. Masinter, and M. McCahill.

http://www.ietf.org/rfc/rfc2396.txt

RFC 2396, "Uniform Resource Identifiers (URI): Generic Syntax," by T. Berners-Lee, R. Fielding, and L. Masinter.

http://www.ietf.org/rfc/rfc2141.txt

RFC 2141, "URN Syntax," by R. Moats.

http://purl.oclc.org

The persistent uniform resource locator web site.

http://www.ietf.org/rfc/rfc1808.txt

RFC 1808, "Relative Uniform Resource Locators," by R. Fielding.

 

Hypertext Transfer Protocol (HTTP)