Forum Moderators: mack
"URL" (Uniform Resource LOCATOR)is a sub-set of URI. URL is certainly the best known type of URI, since it is used to point to where a resource is on a network, esp. the internet. So, for example, an "http..." address, which identifies the location on the internet network of a resource is a URL.
A URL is a type of URI that identifies a resource via a representation of its primary access mechanism (e.g., its network "location"), rather than by some other attributes it may have.-From the "Report from the Joint W3C/IETF URI Planning Interest Group: Uniform Resource Identifiers (URIs), URLs, and Uniform Resource Names (URNs): Clarifications and Recommendations" (August 2002)
Note -- a resource can be identified by attributes other than location. Thus, we can refer to a "URN" (Universal Resource Name) --another subset of URI distinct from URL.