RE: Proposal: 'tag' URIs

Could "dated URLs" meet the same requirements that were identified
for "tags"?

http://lists.w3.org/Archives/Public/uri/1998Jan/0009.html

and 

http://lists.netsol.com/cgi-bin/wa?A2=ind0009&L=URN-IETF&P=R2811


   1) Identifiers are unique across space and time and come from a
      practically inexhaustible supply;
   2) identifiers are convenient for humans to mint (create), read, type
      etc.;
   3) zero registration cost, at least to holders of domain names or
      email addresses; and negligible cost to mint new identifiers;
   4) easy identification of the entity that has minted the identifier,
      should that be desirable;
   5) independence of any particular resource-location or identifier-
      resolution scheme.