URI not URL (it is deprecated)

I have been asked about this a few times, I had learned from Jim that it had been deprecated but thought it would be useful to provide the documentation to demonstrate it.

This apache doc gives a good summary :

Which points you to :

Basically URL is a subset of URI which

… in addition to identifying a resource, provide a means of locating the resource by describing its primary access mechanism (e.g., its network “location”)