ODM2 Variable Name Controlled Vocabulary ODM2 Working Group A vocabulary for describing the name of Variables. Carbon, suspended organic DEPRECATED -- The use of this term is discouraged in favor of the use of the synonymous term "Carbon, particulate organic". Originally from the CUAHSI HIS VariableNameCV. See: http://his.cuahsi.org/mastercvreg/edit_cv11.aspx?tbl=VariableNameCV.