Delta sets are very general. They include simplicial complexes, open sets in simplicial complexes, quotients of simplicial complexes, quivers and so multi-graphs or simply hypergraphs, sets of sets. For the later, the geometry is not that interesting in general. As for quivers, the associated delta set is one dimensional only consisting of vertices and edges (the later includes loops). I more recently noticed that one can also, similarly as getting a in general higher dimensional simplicial complex from a graph get also a higher dimensional delta set from a quiver. Moreover, it seems that also divisors can be modeled very well using delta sets. By the way, when flying on saturday, the pelegrin falcon friend dived twice onto the drone. It was visible in one of the frames: