URIs < Metadata in the Yahoo! Directory

Uniform Resource Names (URNs): Handle System
A distributed computer system which stores names of digital items and which can quickly resolve those names into the information necessary to locate and access the items.
www.handle.net
UR* and The Names and Addresses of WWW objects
www.w3.org/Addressing/Addressing.html
Universal Resource Identifiers
Hypertext version of RFC 1630.
www.w3.org/Addressing/URL/URI_Overview.html
RFC 2168 - Resolution of URIs Using the DNS
www.cis.ohio-state.edu/htbin/rfc/rfc2168.html
Uniform Resource Names (URNs): RFC 2169 - Using HTTP in URN Resolution
www.cis.ohio-state.edu/htbin/rfc/rfc2169.html

Metadata > URIs