Abbreviation of Uniform Resource Locator, the address of documents and other available means on the Web. In example: http: // www.exemple.com, the first part of the address (http: // for HyperText Transfer Protocol) points out the protocol to be used by the navigator, the second corresponds in the name of domain where is the resource (www.exemple.com / exemple.htm present on the World Wide Web, literally the « big worldwide Web » refers to the page available "Exemple.htm" on the name of very domain " exemple.com�).

Technique consisting of rewriting by the web server under a form simplified of complex URLs. Often used to ameliorate the reference of the dynamic pages of which URLs is made up of variables, he allows a better catch in consideration (and therefore a better reference) of the page by robots. Eg: « exemple.php? Cat=1&produit=12.php » can be transformed into "Exemple_1_12.html" in the navigator.