Start d2r on molgenis n3 mapping :

 * In local installation d2r-server -p 2020 molgenis.n3
 * there are some exception about :
   * de.fuberlin.wiwiss.d2rq.D2RQException: Column @@digital_identity.digital_identity_id@@ not found in database (E0)
   * Exception in thread "main" java.lang.[wiki:NullPointerException]
     * at de.fuberlin.wiwiss.d2rs.!JettyLauncher .start(!JettyLauncher.java:68 )
     * at d2r.server.startServer(!server.java:86 )
     * at d2r.server.main(!server.java:57 )

  TODO :

 * Next steps : check which DB it makes use . This digital identity seems to be in a really old DB .
 * after taking NULL EXCEPTION off the command line run of D2R..\
 * check the SPARQL interface if is running om localhost/8080 http://localhost:2020/snorql/

DONE : 

  23     !d2rq:jdbcDSN "jdbc:mysql://127.0.0.1/addressbook"; this is actually used . So copy another molgenis n3 mapping from a valid database. The schemes seems to be incompatible .