James Dice has done great job of promoting the Independent Data Layer concept and what it is for and why through the Smart Building Tech Stack diagrams being shared on the Nexus Labs community platform he founded and runs. The one above is from part 3 of series of posts on Horizontal Architecture (see more here), which also mentions the Building Operating System concept created by the digital buildings team at Google and The Smarter Stack created by the Monday Live crew. All of these could be possible ways of slicing and dicing the Smart Building Technology Landscape (possible as a way of organising the layout of an exhibition like the Smart Buildings Show or the recent Smart Building Show Case at PropTech Connect. However, I am not sure they are quite what I am looking for as far as the infographic I have in mind is concerned (see more here).