code: public static String convertUrn(String urn) {
      	String[] tokens = urn.split(":");
      	return "http://identifiers.org/" + tokens[tokens.length-2] 
      		+ "/" + URLDecoder.decode(tokens[tokens.length-1]);
      }
docs: Converts a MIRIAM URN into its equivalent Identifiers.org URL.
  
  @see #getURI(String, String) - use this to get the URN
  @see #getIdentifiersOrgURI(String, String) - prefered URI
  
  @param urn - an existing Miriam URN, e.g., "urn:miriam:obo.go:GO%3A0045202"
  @return the Identifiers.org URL corresponding to the data URN, e.g., "http://identifiers.org/obo.go/GO:0045202"
  
  @deprecated this method applies {@link URLDecoder#decode(String)} to the last part of the URN, which may not always work as expected (test yours!)