Fig. 1

Structure of the core VaccO ontology. Fundamental classes representing property categories are shown as orange boxes. Properties marked with an asterisk are propagated along subclass relations (is-a) and containment relations (has-ingredient). Their domains are expanded along the same relations. Examples for representing a vaccine product from the Article 57 database (‘Havrix’), and a vaccine group defined by ATC code J07BC02 (‘Hepatitis A, inactivated’) are shown with dashed frames. The visualization follows the Graffoo specification [45]