Universal Resource Identifier(URI, originally "UDI" in some {WWW} documents) The generic set of all names and addresses which are short strings which refer to objects (typically on the {Internet}). The most common kinds of URI are {URL}s and {relative URLs}. URIs are defined in {RFC 1630}. {W3 specification (http://www.w3.org/hypertext/WWW/Addressing/URL/URI_Overview.html)}. (1997-07-16)