The first comprehensive book explaining the backbone for digital construction methods: the Industry Foundation Classes schema. Interoperable data schemas are the prerequisite to advancing the use of digital methods in the architectural engineering and construction industry. However, the predominant Industry Foundation Classes (IFC) are complex and have been focused on the representation of buildings only. With the extension for infrastructures, Interoperability aims to provide a comprehensive explanation of the IFC structure as well as its application to infrastructure assets. Finally, buildingSMART specifications are presented and contextualized for their use in digital workflows.