== Tutorial: Practical use of ISO 15926; Where do you start? == To put semantics to use for process industry data, you need to know which distinctions matter the most. This tutorial begins with a concise review of basic ontological notions such as class, individual, and relation. We move on to an in-depth discussion of four categories that are basic to any industrial life-cycle:''Function'','' Component'','' Product'', and'' Individual'', as defined in the IEC61346 standard. You will learn how to apply these categories using ISO 15926, in open, verifiable, and vendor-independent industrial information management. We go through detailed ISO 15926 models for a selection of challenging questions in industrial life-cycle semantics. Experiences from implemented ISO 15926 projects will be described along the way, ranging from data exchange mechanisms (iRING) to product catalogs (!EqHub).