ODM2 Variable Type Controlled Vocabulary ODM2 Working Group A vocabulary for describing the type of Variables. VariableTypes provide a way to group Variables into categories for easier querying and filtering. Instrumentation Variables associated with instrumentation and instrument properties such as battery voltages, data logger temperatures, often useful for diagnosis. Originally from CUAHSI HIS GeneralCategoryCV. See http://his.cuahsi.org/mastercvreg/edit_cv11.aspx?tbl=GeneralCategoryCV.