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Urn is a subclass of Identifier, as are about 30 other classes which are identifier types. Urn is just another identifier type that might identify a resource, in the same manner as an ISBN might identify a resource.    A Urn is in fact a URI, but that’s irrelevant.  It is not an HTTP URI.   HTTP URIs, and only HTTP URIs, are used to identify resources that are subjects or objects of RDF statements.

Ray 


> On Jun 9, 2016, at 6:25 PM, Joseph Kiegel <[log in to unmask]> wrote:
> 
> The definition of the class bf:Urn should be Uniform Resource Name, rather than Uniform Resource Number.
>  
> The larger question is why BF uses URN rather than URI.
>  
>