obsolete: product type, unknown true Damion Dooley's note: this term isn't informative in an ontology paradigm. To express that a product type is appropriate but not known, reference 'food product type' term itself for a value. LanguaL curation note: Used when no product type is evident from the food product name, e.g., 'artificially sweetened food', 'food with herbs added', etc. [FDA CFSAN 1995] agency food product type