Would it be possible to separate out the new entities into their own PRs? It seems like the new entities (part, fa, inv, and mt) are fairly self-contained and could be reviewed in distinct chunks.

Originally posted by @tsalo in #508 (comment)

I didn't want to start a new conversation on #508 to keep things focused. But this is worth discussing. To do this, we would need consent from the BEP-001 team, as this would cause some disruption, and (if they consent) to determine who will do the work of separating the PRs and keeping branches synchronized (does not need to be part of the existing BEP-001 team).