- On the SW, resources are identified by URI-s, e.g.:
						
- URL-s
								
- http://www.ivan-herman.net
 - ftp://ftp.cwi.nl
 
 - URN-s 
								
- urn:ISBN:0-395-36341-1
 - urn:lsid:ensembl.org:homosapiens_gene:ensg00000002016
 
 
 - URL-s
								
 - Anybody can create metadata on any resource on the Web
 - It becomes easy to merge metadata
 - URI-s ground RDF into the Web