2021-01-16 UTC
# 
[KevinMarks] agreed - a grid for an event is very useful -this isn't arbitrary nesting of events, it is the session grid that's needed, and it's been something we tried to come up with a way to add microformats to before and found it hard because of the implied time and venue from the grid. I think that is what drove the include pattern originally, though that probably is too complex.