Records vs. nodes

[Nolan Darilek]

Could someone kindly explain this distinction to me?

My current understanding is that what was once just a plain event can
now contain multiple records, and each view can represent itself as
multiple nodes.

Also, it seems that a node represents an area on-screen and properties
associated with the view that inhabits it, but are there any view types
that emit multiple nodes?

Under what circumstances would an event contain multiple records, and
what do subsequent records convey that the first cannot?

Thanks.