[CF-metadata] URNs

[Benno Blumenthal]

This is an example which illustrates the usefulness of namespaces with 
attributes in particular and the semantic web in general:  alternate 
representations of the same information.   I have been working on an 
ontology for CF and I intend to crosswalk between CF representations of 
projections and OpenGIS representations of projections:  the Semantic 
Web framework would allow writing rules for generating one set of 
metadata from the other, and all representations would be simultaneously 
available.

A writer of software could then choose which representation to use, 
independent of which representation was used in the dataset metadata.

Benno