Uniform Resource Locator
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Most commonly used to find resources on the World Wide Web, but much more general in capability, a Uniform Resource Locator (URL). Their syntax is:
<scheme>:<scheme-specific-part>
A URL contains the name of the scheme being used (<scheme>) followed by a colon and then a string (the <scheme-specific-part>) whose interpretation depends on the scheme. [1]
Representative schemes
Primary WWW usage
Most often, URLs use a scheme of http to refer to the Hypertext Transfer Protocol as the scheme, and a fully qualified Domain Name System (DNS) name as the locator.
commonly refers to a link on the World Wide Web. URLs usually start with http://, e.g. this page's URL is http://en.citizendium.org/wiki/Uniform_Resource_Locator. In this example, the en.citizendium.org is a DNS name.
Direct IP protocol request
//<user>:<password>@<host>:<port>/<url-path> References
- ↑ Berners-Lee T, Masinter L, McCahill M (December 1994), Uniform Resource Locators (URL), RFC 1738