Work flows for digital construction employ a multitude of software types. Among others, authoring-, simulation- and validation- tools or collaborative platforms can be cited. Information exchange is supported by Industry Foundation Classes (IFC), a vendor independent data scheme, developed and managed by buildingSMART international and standardized by ISO. IFC can be considered as the “backbone” for a lossless digital communication of product data in construction. It is therefore important to understand which information can be transferred by IFC and how this complex data scheme is structured. The present book first introduces the IFC structure using buildings as examples, paying a particular attention to placement and spatial organization of constructed objects. The concept is then extended to the newest IFC version 4.3, treating infrastructure assets like roads and bridges. Complementary chapters explain how geometry is represented by IFC, the interaction of BIM and GIS systems, as well as the future of IFC. Finally, buildingSMART standards are presented and contextualized for their use in digital workflows. This book is recommended for everybody who is interested in construction and maintenance processes driven by openBIM methods, in particular for AEC professionals defining data exchange requirements as well as BIM Coordinators and Managers.