reconsider use of bibo:presentedAt

[clange]

We currently say that a proceedings volume as "presented at" a workshop event. However weren't rather the individual papers presented a workshop?

[csarven]

I think both are valid, and an absolute divide probably is not necessary. It is true that the papers are the main focus of the events and they are presented, but there is more to the event. As for the proceedings, I think that it is acted/played out/presented in-real-life at the event. So, seems suitable enough for me.

bibo:Proceedings is a subclass of bibo:Document. As far as machines are concerned, there is no difference between the proceedings and a paper being presented at an event. I think in this particular case, it is more of a human conceptual concern.

Papers (at the source URL if available) may/should indicate that they were presented at an event. Both proceedings and papers will be covered in any case.