Building system with entity graph storing events

A method for a building, the method comprising:

• storing, by a processing circuit, a plurality of entities and a plurality of relationships between the plurality of entities in a building entity database, wherein the plurality of entities represent building components of the building and data of the building components and the plurality of relationships represent relationships between the building components of the building and the data;
• receiving, by the processing circuit, a plurality of events from a building component of the building;
• generating, by the processing circuit, a plurality of event data entities for the plurality of events;
• and
• adding, by the processing circuit, the plurality of event data entities to the building entity database and one or more relationships between the plurality of event data entities and a building component entity of the plurality of entities representing the building component.

A building system of a building comprising:

• one or more storage devices storing instructions thereon;
• and
• one or more processors that execute the instructions causing the one or more processors to:
• store a plurality of entities and a plurality of relationships between the plurality of entities in a building entity database, wherein the plurality of entities represent building components of the building and data of the building components and the plurality of relationships represent relationships between the building components of the building and the data;
• receive a plurality of events from a building component of the building;
• generate a plurality of event data entities for the plurality of events;
• and
• add the plurality of event data entities to the building entity database and one or more relationships between the plurality of event data entities and a building component entity of the plurality of entities representing the building component.