URLs as Globally Unambiguous Identifiers
  - URL has two
different uses:
    
      -         Unambiguous name
for something
 
      -         Location of a
document
 
    
   
  - Name is
still useful even without a location
 
  - URLs can be
used to identifying concepts
    
      - Especially
useful for ontologies & metadata
 
      - Also useful
for other data
 
    
   
  - Document at
URL can describe the concept