Written in an engaging and accessible style, this book provides a clear introduction to the organization and integration of modern data worlds and explains the contribution of the widely used ISO standard SDMX in statistics. It is therefore a must-read for data experts and those aspiring to become one. Nowadays, both professional and personal life are increasingly shaped by explosively growing data environments. This data growth is fueled by search engines and social networks, as well as new technological possibilities like Big Data. It presents a significant opportunity; however, whether it is about advancing the blockchain revolution or making smartphones even smarter, success hinges on how well the necessary data can be integrated—collected, linked, and analyzed. A fundamental aspect of this is the introduction of a comprehensive order.