Up to 30% of annual spend across the built environment is lost in inefficiencies related to poor quality data1. This is seen in lost productivity due to underperforming economic and social infrastructure. Effective information management will enable better decisions, leading to financial savings, improved performance and service, and better outcomes for business and society per whole-life pound. To make this possible an information management framework is necessary. This paper seeks to build consensus on foundational definitions and guiding values – the Gemini Principles – and to begin enabling alignment on the approach to information management across the built environment.