a nice approach for identifying thigs with uris (known as the uri crisis) is the taguri.

http://www.taguri.org/

note that taguris are not wise to be used with things that have already a http:... uri. And in my opinion, using any existing wiki system to make a URI has the same outcome as taguri and is easier to handle for the lesser deamons. (we, the high arcane sorcerers of semweb, have a domain, know how to use a date and can live with a uri that points to nirwana on the http space. lesser demons enter uris into browsers)

but despite these flawbacks, taguri is a nice idea.

thanks to andy seaborne for mentioning it to me.