What is the difference between URI and URL?

URI (Uniform Resource Identifier) identifies a resource with by its location or by its name.
It has two parts which are as follows:
  • URL (Uniform Resource Locator)
    The URL identifies the location of the resource along with the ways to access the resource.
  • URN (Uniform Resource Name)
    The URN identifies a resource by its name in a given namespace, but it does not provide the actual location of the resource and as to how it can accessed.

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