Though a tobacco product may consist of multiple components, this concept map illustrates the representation of the hierarchical relationships between a single component and and its subcomponents/ingredients in the IQ domain structure using IDGCMPID, IQPARENT, and IQLEVEL. The hypothetical parent component has two subcomponents/ingredients, A and B. Additionally, component B, a complex ingredient, consists of two ingredients, B1 and B2. A total of five components, subcomponents, and ingredients (purple boxes) would be represented in the IQ domain.