UR* and the Names and Addresses of WWW Objects

http://www.w3.org/pub/WWW/Addressing/Addressing.html

This page contains background information and the specifications for the Universal Resource identifier family. Members of this family include URIs (Universal Resource Identifiers), URLs (Universal Resource Locators), and URNs (Universal Resource Names). These identifiers provide a standard way to index resources on the WWW.

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