Whether the field has had no set since it was created or re-armed.
Whether the source the record was hydrated from omitted the field. See EntityField.NotLoaded.
The value the field is compared with to decide whether it's dirty.
The field's value.
OptionalWrittenWhether the field was explicitly set after being not-loaded. See EntityField.Dirty.
A field's value and dirty-tracking state, as EntityField.GetState captures them.