Figure 3: ToxRefDB general schema with changes made from ToxRefDB v1 to ToxRefDB v2.
Highlighted in blue are the additions to the generic schema to accommodate the updates and additional features for ToxRefDB v2. These include tables to capture the dose-response, quantitative data; guideline profiles for the inference workflow to determine negative endpoints and effects; UMLS cross-references; and effect groupings for systematically calculating PODs and associated effect levels.