Difference between URI and URL [duplicate]

Question

Possible Duplicate:
What's the difference between a URI and a URL?

How are URI and URL distinguished?

Answer 1

A URL is a type of URI.

Having said that, most people use the two terms interchangeably.

From wikipedia (URL):

In computing, a Uniform Resource Locator (URL) is a Uniform Resource Identifier (URI) that specifies where an identified resource is available and the mechanism for retrieving it.

So, a URI identifies a resource (acts as its ID), a URL specifies the resource location.