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Finally, the IQ domain is used to represent the quantity (target, minimum and maximum) of each ingredient identified in IGDCMPID that the product (SPTOBID) is designed to contain, with the units for these values represented in IQUNIT. The function of each ingredient is described in IQFUNCT. Ingredients that appear in more than one component of the tobacco product are quantified separately for each component. IQPARENT and IQLEVEL are used to identify the component/ingredient of which the ingredient in a record is a constituent

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