Marginal A quality assessment has been made and one or more data quality objectives has not been met. The observation may be suspect and has been assessed to be of marginal quality. None No data quality assessment has been made. Unknown The quality of the observation is unknown. Bad A quality assessment has been made and enough of the data quality objectives have not been met that the observation has been assessed to be of bad quality. Good A quality assessment has been made and all data quality objectives have been met. A vocabulary for describing the quality of the observation. ODM2 Working Group ODM2 Quality Code Controlled Vocabulary