Fig. 6

Relating ontologies with ECTO. Mixture exposures in ECTO must have the stimuli represented as its own class in another ontology (e.g., ENVO) for ECTO to reference in the exposure class. Here, the ECTO class ‘exposure to methyl cellulose paste’ and its parent are in white, its stimulus ‘methyl cellulose paste’ and the related ENVO hierarchy are in light gray, and the subcomponents of the mixture, ‘methyl cellulose’ and ‘water’ are seen in dark gray, along with their ChEBI hierarchies