Thomas D. Yes - agreed, certainly multidimensional, It could be more integrated representation when we fold in temporal constraints along with both KG and PG. Even more powerful when conditional logic is mapped in the model since it is outside of ERD or Kimball's dimensional technique currently.
Background: trained engineer, practicing data architect - have been in data management field almost three decades. Have seen, done all aspects of data - strategy, governance, metadata, modeling (SQL/noSQL), integration etc.