What is a URI?

A Uniform Resource Identifier (URI) is a compact string of characters for identifying an abstract or physical resource (Berners-Lee ta al, 1998, rfc2396). Breaking this down into manageable chunks:

Consequently: at their most basic level, URIs use a consistent syntax and identify a resource. Though multiple URIs can identify a given resource simultaneously, it is imperative that a single URI should not identify multiple different resources. Hence, each URI should be globally unique.

Generic IETF URI syntax may be found here; World Wide Web-specific IETF syntax may be found here.

Continue the tutorial by clicking the links below.