Notching Table Legs for a Shelf

Notch the leg, or notch the shelf? How about both? October 19, 2013

Question
When designing any small circular or square table made with square legs should notch the legs to accept a square bottom shelf or notch the bottom shelf to fit around the legs? Which is the typical practice?

Forum Responses
(Furniture Making Forum)
From Contributor H:
Historically there is no right answer. I have seen historical pieces done both ways. In my pieces I typically nip the corners of the shelf and have a matching notch cut across the corner of the leg. Cutting these simple notches is much easier than a square cut notch in each shelf corner. A dowel can be easily added to the corner joint if needed.