1. Purpose: Must have clear purpose
   1. Public good Must be used to deliver genuine public benefit in perpetuity
   1. Value creation Must enable value creation and performance improvement
   1. Insight Must provide determinable insight into the built environment
2. Trust: Must be trustworthy
   1. Security Must enable security and be secure itself
   1. Openness Must be as open as possible
   1. Quality Must be built on data of an appropriate quality
3. Function: Must function effectively
   1. Federation Must be based on a standard connected environment
   1. Curation Must have clear ownership, governance and regulation
   1. Evolution Must be able to adapt as technology and society evolve

https://www.cdbb.cam.ac.uk/DFTG/GeminiPrinciples