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URI ○꠹｜Definition｜1st｜20260905163242-00-⌔
Uniform Resource Identifier - Wikipedia
Uniform Resource Identifier
A Uniform Resource Identifier (URI), formerly Universal Resource Identifier, is a unique sequence of characters that identifies an abstract or physical resource,[^1] such as resources on a webpage, email address, phone number,[^1] books, real-world objects such as people and places, and concepts. In particular, the resource need not be retrievable via the Internet, or any computer network.[^1]
URIs that provide a means of locating and retrieving information resources on a network (like the Internet, an Intranet or a computer file system) are called Uniform Resource Locators (URLs). URLs are therefore a subset of URIs.[^1] Other URIs provide only a unique name, without a means of locating or retrieving the resource or information about it; these are Uniform Resource Names (URNs). The web technologies that use URIs are not limited to web browsers.
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