A Uniform Resource Identifier, the naming convention for objects on the Internet. A URI consists of a scheme, followed by a colon, followed by a scheme specific name. A URI can be further classified as a Locator, or a Name, or both. The term "Uniform Resource Locator" (URL) refers to the subset of URI that identify resources via a representation of their primary access mechanism (e.g., their network "location"), rather than identifying the resource by name or by some other attribute(s) of that resource. The term "Uniform Resource Name" (URN) refers to the subset of URI that are required to remain globally unique and persistent even when the resource ceases to exist or becomes unavailable.