...
- unique identifier
- location
- start time
- end time (possibly)
- agent
- inputs (e.g. materials and energy; consumables and non-consumables)
- outputs
- processes
- objective (create, reduce, destroy, avoid) (optional / not required in all instances)
A state
- unique identifier
- location
- point in time
- metrics
- type (actual [measured] or baseline [counterfactual])
...