...
- 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)
An Should there be an event class? An event is like an activity but without the intention of an agent. An accident is an event but it is not an activity.
A state
- unique identifier
- location
- point in time
- metrics
- type (actual [measured] or baseline [counterfactual])
...
- unique identifier
- unit of measure
- magnitude
- state "before"
- state "after"
- cause (causal connection to activity)
- standard followed (ID)
- effect (e.g. primary or secondary)
...
A standard
- unique identifier
- scope applicability - type of agent, type of activity, state
- requirements (e.g. reporting requirements, calculation requirements)
- version
...