 Welcome to the FACE CTS Learning Series, Chapter 4, Data Model Conformance Verification. In this chapter, we will provide a detailed description of data models, explain how FACE and the CTS use data models, explain why data models are important to the testing of UOCs in the context of the CTS, how to configure the CTS to test the data model for conformance, how to use the command line to test data models, and introduce resources for more information on what data models are and how to create data models. In previous videos, we briefly introduced data models as it pertained to the operation of the CTS and where to insert the FACE Share Data Model, or SDM, and UOP, or Unit of Portability, Supplied Model, or USM. Although we will expand on these topics, the creation and an in-depth analysis of data models is beyond the scope of the CTS Learning Series. We will, however, supply resources to learn more about the theory and contents of data models. Thank you for watching. In the next video, entitled Data Model Conformance Verification Overview, we will provide necessary information for understanding the theory of data models, explain how FACE and the CTS use data models, and explain data models in the context of the CTS.