Building data platform with a graph change feed

A method comprising:

• receiving, by a processing circuit, a modification to a graph, the graph comprising a plurality of nodes and a plurality of edges between the plurality of nodes, the plurality of nodes representing entities of a building and the plurality of edges representing relationships between the entities of the building;
• generating, by the processing circuit, a change feed event, the change feed event recording the modification to the graph;
• and
• adding, by the processing circuit, the change feed event to a change feed comprising a plurality of change feed events representing modifications to the graph at a plurality of different times.

A building system of a building comprising:

• one or more memory devices having instructions thereon;
• and
• one or more processors configure to execute the instructions causing the one or more processors to:
• receive a modification to a digital twin, the digital twin comprising a plurality of nodes and a plurality of edges between the plurality of nodes, the plurality of nodes representing entities of the building and the plurality of edges representing relationships between the entities of the building;
• generate a change feed event, the change feed event recording the modification to the digital twin;
• and
• add the change feed event to a change feed comprising a plurality of change feed events representing modifications to the digital twin at a plurality of different times.