Add a multiplexed dimension?

[jgrewe]

Gicmo and I discussed this during the nix implementation in relacs. When one considers the streaming of data coming from DAQ boards, they are often multiplexed. Such a dimension would be handy in such cases. Further, during TF meetings, the question was raised whether we can support recordings with gaps in them.

[balint42]

I have not enough insight into usage cases - you guys decide

[stoewer]

I am also not quite sure what is meant by multiplexed dimension...