Water quality A taxonomy containing terms associated with water quality variables or processes. Originally from CUAHSI HIS GeneralCategoryCV. See http://his.cuahsi.org/mastercvreg/edit_cv11.aspx?tbl=GeneralCategoryCV. ODM2 Taxonomic Classifier Type Controlled Vocabulary ODM2 Working Group A vocabulary for describing types of taxonomies from which descriptive terms used in an ODM2 database have been drawn. Taxonomic classifiers provide a way to classify Results and Specimens according to terms from a formal taxonomy.