(1) A unique address that is used to identify content on the Web, such as a page of text, a video or sound clip, a still or animated image, or a program. The most common form of URI is the Web page address, which is a particular form or subset of URI called a Uniform Resource Locator (URL). A URI typically describes how to access the resource, the computer that contains the resource, and the name of the resource (a file name) on the computer. See also Uniform Resource Name.
(2) A compact string of characters for identifying an abstract or physical resource.