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The following example illustrates the representation of an ENDS tobacco product's identifiers and descriptors using the TO domain. Note that this example uses TOSCAT to emphasize and differentiate the 2 distinct types of parameters represented in TO: tobacco product identifiers and tobacco product descriptors.

The manufacturing parameter specifications of the ENDS product as intended for used are represented in the PD domain. The following example shows the target, minimum, and maximum values associated with each of 33 separate design parameters. These parameters are defined manufacturing specifications, not characteristics that are determined experimentally. 

https://www.sciencedirect.com/science/article/pii/S004060311930752X

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This is an example for the required tobacco product characterization, property description, and design parameter information in an FDA marketing application for one type of tobacco product Electronic Nicotine Delivery System (ENDS) (Vapes). There are many more and various types of tobacco products, and their parameters can be found in the in the FDA final rule and guidance documents for tobacco product Premarket Authorization (PMTA) and Substantial Equivalence pathways. The applicant submitting for SE and PMTAs may include test data to include test protocols, quantitative acceptance criteria, data sets, and summary of results as applicable for these parameters.

Tobacco Product Identifier (TO) (similar to Device Identifiers (DI)) is a study reference dataset that provides a mechanism for uniquely identifying a tobacco product. The primary purpose of this dataset is to provide a list of the products used in an application or study and to provide identifying information for each product, such as product category type, manufacturer, properties, product name, etc., as applicable. All identifying information is grouped by the Sponsor Tobacco Product Identifier (SPTOBID), a consistent variable, that is available for use in other domains where data pertaining to the product may be found.

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The Tobacco Design Parameters (PD) is similar to the Device Properties (DO) domain represents properties of the tobacco product that do not vary over the life of the product. This is a findings domain and defines important characteristics of a product that the sponsor manufacturer wishes to include in the submission but do not form part of the unique sponsor-defined identification of the product. Each property is identified using controlled terminology and is stored in TPTESTCD/TPTEST.

*PG/VG Ratio = Propylene Glycol to Vegetable Glycerin Ratio

The Tobacco Product Testing (PT) (similar to the Laboratory Test Results (LB) domain) dataset shows the tobacco product test demonstrating the actual tests and test results for the specified Design Parameter Specification as noted in the DU dataset (??? PD dataset).

Finally, the PT domain is used to represent the actual results of testing the manufactured ENDS product for conformance to the tobacco product design parameters shown in PD. PTCAT is a Required variable and is set to "DESIGN PARAMETER TESTING" for all records here. Typically, applicants would submit data on each parameter in multiple replicates. For simplicity of review, only 1 replicate per parameter is shown. Note that PTREPNUM (repetition number) = 1 for all rows.