What is the difference between a URI, a URL, and a URN?

URI, URL, and URN are all acronyms used to describe ways to identify resources on the internet. Here's a brief explanation of what each term means:

URI (Uniform Resource Identifier): A URI is a string of characters that identifies a resource on the internet. It can be used to identify a web page, an image, a file, or any other resource. URIs include both URLs and URNs.
URL (Uniform Resource Locator): A URL is a type of URI that identifies the location of a resource on the internet. It specifies the protocol (e.g., HTTP, HTTPS), the domain name or IP address, and the path to a specific resource. URLs are commonly used to link to web pages and other online resources.
URN (Uniform Resource Name): A URN is another type of URI that identifies a resource on the internet using a persistent name. Unlike URLs, which can change if the location of the resource changes, URNs remain the same even if the resource is moved. URNs are less commonly used than URLs, but they are useful for identifying resources that are meant to be accessed over a long period of time.

In summary, all URLs are URIs, but not all URIs are URLs. URNs are another type of URI that identifies resources on the internet using a persistent name rather than a location.

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