PROCEDURE: IUG_CRIB_MDDB A sample crib sheet that explains how to search data from IUGONET metadata database (MDDB). You can run this crib sheet by copying & pasting each command below (except for stop and end) into the IDL command line. Or alternatively compile and run using the command: .run iug_crib_mddb NOTE: For more information of the IUGONET project, see: http://www.iugonet.org/en & http://search.iugonet.org/iugonet/. Written by: Y.-M. Tanaka, May 2, 2011 National Institute of Polar Research, Japan. ytanaka at nipr.ac.jp