Overview: The National Health Data Dictionary (NHDD) provides national data standards for the health sector. This version (Version 16.2) reflects changes to data standards between July 2013 and June 2014. Eight national minimum data sets, 12 data set specifications, 16 data element clusters, 174 data elements, 13 classification schemes and 13 glossary items have been added to the NHDD. Nine national minimum data sets, 4 data set specifications, 7 data element clusters, 64 data elements, 1 classification schemes and 1 glossary item have been superseded and 12 data elements have been retired since the previous version of the NHDD (Version 16.1) was published.