ODM2 Variable Name Controlled Vocabulary ODM2 Working Group A vocabulary for describing the name of Variables. Activity, beta-N-acetyl glucosaminidase Assay for microbial activity using beta-N-acetyl glucosaminidase https://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/microbiological-assay Added to support Critical Zone Observatory (CZO) data use cases.