URI is a collection of Perl modules that represent and manipulate Uniform Resource Identifier (URI) references as specified in RFC 2396. . URI objects can be used to access and manipulate the various components that make up these strings. There are also methods to combine URIs in various ways. . The URI class replaces the URI::URL class that used to be distributed with libwww-perl. This package also includes an emulation of the old URI::URL interface, which implements both the old and the new interface.