Small point - Per the RFC, a URN is a URI name scheme. I assume you were trying to differentiate between URI locator schemes (what we used to call URL's) and URI naming schemes (URN's).
Mark Crawford
Research Fellow - LMI XML Lead
W3C Advisory Committee, OASIS, RosettaNet Representative
Vice Chair - OASIS UBL TC & Chair Naming and Design Rules Subcommittee
Chair - UN/CEFACT XML Syntax Working Group
Editor - UN/CEFACT Core Components
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