URI, URL & URN
A Uniform Resource Locator is the address of a resource on the Internet. A URL indicates the location of a resource. It is also referred to as a web address
Uniform Resource Names are identifiers for resources. They are location independent.
A URN is an Internet resource with a static name that remains valid even if its data is moved to another location. Unlike a URL, which cannot work if the content is moved, a URN is always able to track the resource of certain data on the Web, hence resolving a frequent issue of moving of data.
A Uniform Resource Identifier can be a name, locator, or both for an online resource where a URL is just the locator. URL & URN are a subset of URI. That means all URL & URN are URI. All URLs are URI but not all URIs are URLs because a URI could be a name instead of a locator. All URNs are URI but not all URIs are URNs because a URN could be a locator instead of a name.
A URN is similar to a person's name, while a URL is like a street address. The URN defines something's identity, while the URL provides a location.
Uniform Resource Names are identifiers for resources. They are location independent.
A URN is an Internet resource with a static name that remains valid even if its data is moved to another location. Unlike a URL, which cannot work if the content is moved, a URN is always able to track the resource of certain data on the Web, hence resolving a frequent issue of moving of data.
A Uniform Resource Identifier can be a name, locator, or both for an online resource where a URL is just the locator. URL & URN are a subset of URI. That means all URL & URN are URI. All URLs are URI but not all URIs are URLs because a URI could be a name instead of a locator. All URNs are URI but not all URIs are URNs because a URN could be a locator instead of a name.
A URN is similar to a person's name, while a URL is like a street address. The URN defines something's identity, while the URL provides a location.
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