Ah thanks for the response! That makes sense - I gloss over it a bit in the demo intentionally, but that's a miss. The semantic definition flow is pretty much identical to what I think I'm reading with plisqin - there's an inline definition format (similar to DDLs in SQL), with the opportunity to reuse it by saving it and importing it. The separation is between SELECT/DDL - the relationships aren't defined in a select via Joins, they're defined before it in a separate statement then implicitly reused in the select.

Plisqin looks fun, the design rules resonate. If you don't pick it up again today, perhaps another time!